Merge remote-tracking branch 'origin/dev' into nd4j

# Conflicts:
#	CHANGELOG.md
#	examples/build.gradle.kts
#	settings.gradle.kts

.gitignore

@@ -8,5 +8,3 @@ out/
 
 # Cache of project
 .gradletasknamecache
-
-gradle.properties

CHANGELOG.md

@@ -5,6 +5,8 @@
 - `fun` annotation for SAM interfaces in library
 - Explicit `public` visibility for all public APIs
 - Better trigonometric and hyperbolic functions for `AutoDiffField` (https://github.com/mipt-npm/kmath/pull/140).
+- Automatic README generation for features (#139)
+- Native support for `memory`, `core` and `dimensions`
 - ND4J support module submitting `NDStructure` and `NDAlgebra` over `INDArray`.
 
 ### Changed
@@ -12,11 +14,13 @@
 - Gradle version: 6.6 -> 6.6.1
 - Minor exceptions refactor (throwing `IllegalArgumentException` by argument checks instead of `IllegalStateException`)
 - `Polynomial` secondary constructor made function.
+- Kotlin version: 1.3.72 -> 1.4.20-M1
 
 ### Deprecated
 
 ### Removed
 - `kmath-koma` module because it doesn't support Kotlin 1.4.
+- Support of `legacy` JS backend (we will support only IR)
 
 ### Fixed
 - `symbol` method in `MstExtendedField` (https://github.com/mipt-npm/kmath/pull/140)

README.md

@@ -9,9 +9,9 @@ Bintray-dev:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/kmat
 
 # KMath
 Could be pronounced as `key-math`.
-The Kotlin MATHematics library is intended as a Kotlin-based analog to Python's `numpy` library. In contrast to `numpy` and `scipy` it is modular and has a lightweight core.
+The Kotlin MATHematics library  was initially intended as a Kotlin-based analog to Python's `numpy` library. Later we found that kotlin is much more flexible language and allows superior architecture designs. In contrast to `numpy` and `scipy` it is modular and has a lightweight core. The `numpy`-like experience could be achieved with [kmath-for-real](/kmath-for-real) extension module.
 
-## Publications
+## Publications and talks
 * [A conceptual article about context-oriented design](https://proandroiddev.com/an-introduction-context-oriented-programming-in-kotlin-2e79d316b0a2)
 * [Another article about context-oriented design](https://proandroiddev.com/diving-deeper-into-context-oriented-programming-in-kotlin-3ecb4ec38814)
 * [ACAT 2019 conference paper](https://aip.scitation.org/doi/abs/10.1063/1.5130103)
@@ -29,7 +29,7 @@ The Kotlin MATHematics library is intended as a Kotlin-based analog to Python's
 
 ## Features
 
-Actual feature list is [here](doc/features.md)
+Actual feature list is [here](/docs/features.md)
 
 * **Algebra**
     * Algebraic structures like rings, spaces and field (**TODO** add example to wiki)
@@ -66,9 +66,101 @@ can be used for a wide variety of purposes from high performance calculations to
 
 * **Fitting** Non-linear curve fitting facilities
 
+## Modules
+
+<hr/>
+
+* ### [examples](examples)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-ast](kmath-ast)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-commons](kmath-commons)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-core](kmath-core)
+> Core classes, algebra definitions, basic linear algebra
+>
+> **Maturity**: DEVELOPMENT
+>
+> **Features:**
+> - [algebras](kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt) : Algebraic structures: contexts and elements
+> - [nd](kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt) : Many-dimensional structures
+> - [buffers](kmath-core/src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt) : One-dimensional structure
+> - [expressions](kmath-core/src/commonMain/kotlin/kscience/kmath/expressions) : Functional Expressions
+> - [domains](kmath-core/src/commonMain/kotlin/kscience/kmath/domains) : Domains
+> - [autodif](kmath-core/src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt) : Automatic differentiation
+
+<hr/>
+
+* ### [kmath-coroutines](kmath-coroutines)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-dimensions](kmath-dimensions)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-for-real](kmath-for-real)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-functions](kmath-functions)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-geometry](kmath-geometry)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-histograms](kmath-histograms)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-memory](kmath-memory)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-prob](kmath-prob)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+* ### [kmath-viktor](kmath-viktor)
+> 
+>
+> **Maturity**: EXPERIMENTAL
+<hr/>
+
+
 ## Multi-platform support
 
-KMath is developed as a multi-platform library, which means that most of interfaces are declared in the [common module](kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
+KMath is developed as a multi-platform library, which means that most of the interfaces are declared in the [common module](/kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
 
 ## Performance
 
@@ -84,8 +176,8 @@ repositories{
 }
 
 dependencies{
-    api("kscience.kmath:kmath-core:${kmathVersion}")
+    api("kscience.kmath:kmath-core:0.2.0-dev-1")
-    //api("kscience.kmath:kmath-core-jvm:${kmathVersion}") for jvm-specific version
+    //api("kscience.kmath:kmath-core-jvm:0.2.0-dev-1") for jvm-specific version
 }
 ```
 

build.gradle.kts

@@ -1,15 +1,15 @@
 plugins {
-    id("ru.mipt.npm.base")
+    id("ru.mipt.npm.project")
-    id("org.jetbrains.changelog") version "0.4.0"
 }
 
-val kmathVersion by extra("0.2.0-dev-1")
+val kmathVersion by extra("0.2.0-dev-2")
 val bintrayRepo by extra("kscience")
 val githubProject by extra("kmath")
 
 allprojects {
     repositories {
         jcenter()
+        maven("https://dl.bintray.com/kotlin/kotlin-eap")
         maven("https://dl.bintray.com/kotlin/kotlinx")
         mavenCentral()
         maven("https://dl.bintray.com/hotkeytlt/maven")
@@ -19,4 +19,10 @@ allprojects {
     version = kmathVersion
 }
 
-subprojects { if (name.startsWith("kmath")) apply(plugin = "ru.mipt.npm.publish") }
+subprojects {
+    if (name.startsWith("kmath")) apply<ru.mipt.npm.gradle.KSciencePublishPlugin>()
+}
+
+readme{
+    readmeTemplate = file("docs/templates/README-TEMPLATE.md")
+}

doc/features.md

@@ -1,14 +0,0 @@
-# Features
-
-* [Algebra](./algebra.md) - [Context-based](./contexts.md) operations on different primitives and structures.
-
-* [NDStructures](./nd-structure.md)
-
-* [Linear algebra](./linear.md) - Matrices, operations and linear equations solving. To be moved to separate module. Currently supports basic
-api and multiple library back-ends.
-
-* [Histograms](./histograms.md) - Multidimensional histogram calculation and operations.
-
-* [Expressions](./expressions.md)
-
-* Commons math integration

docs/features.md

@@ -0,0 +1,14 @@
+# Features
+
+* [Algebra](algebra.md) - [Context-based](contexts.md) operations on different primitives and structures.
+
+* [NDStructures](nd-structure.md)
+
+* [Linear algebra](linear.md) - Matrices, operations and linear equations solving. To be moved to separate module. Currently supports basic
+api and multiple library back-ends.
+
+* [Histograms](histograms.md) - Multidimensional histogram calculation and operations.
+
+* [Expressions](expressions.md)
+
+* Commons math integration

docs/templates/ARTIFACT-TEMPLATE.md

@@ -0,0 +1,37 @@
+> #### Artifact:
+>
+> This module artifact: `${group}:${name}:${version}`.
+>
+> Bintray release version:        [ ![Download](https://api.bintray.com/packages/mipt-npm/kscience/${name}/images/download.svg) ](https://bintray.com/mipt-npm/kscience/${name}/_latestVersion)
+>
+> Bintray development version:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/${name}/images/download.svg) ](https://bintray.com/mipt-npm/dev/${name}/_latestVersion)
+>
+> **Gradle:**
+>
+> ```gradle
+> repositories {
+>     maven { url "https://dl.bintray.com/kotlin/kotlin-eap" }
+>     maven { url 'https://dl.bintray.com/mipt-npm/kscience' }
+>     maven { url 'https://dl.bintray.com/mipt-npm/dev' }
+>     maven { url 'https://dl.bintray.com/hotkeytlt/maven' }
+
+> }
+> 
+> dependencies {
+>     implementation '${group}:${name}:${version}'
+> }
+> ```
+> **Gradle Kotlin DSL:**
+>
+> ```kotlin
+> repositories {
+>     maven("https://dl.bintray.com/kotlin/kotlin-eap")
+>     maven("https://dl.bintray.com/mipt-npm/kscience")
+>     maven("https://dl.bintray.com/mipt-npm/dev")
+>     maven("https://dl.bintray.com/hotkeytlt/maven")
+> }
+> 
+> dependencies {
+>     implementation("${group}:${name}:${version}")
+> }
+> ```

docs/templates/README-TEMPLATE.md

@@ -0,0 +1,110 @@
+[![JetBrains Research](https://jb.gg/badges/research.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
+[![DOI](https://zenodo.org/badge/129486382.svg)](https://zenodo.org/badge/latestdoi/129486382)
+
+![Gradle build](https://github.com/mipt-npm/kmath/workflows/Gradle%20build/badge.svg)
+
+Bintray:        [ ![Download](https://api.bintray.com/packages/mipt-npm/kscience/kmath-core/images/download.svg) ](https://bintray.com/mipt-npm/kscience/kmath-core/_latestVersion)
+
+Bintray-dev:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/kmath-core/images/download.svg) ](https://bintray.com/mipt-npm/dev/kmath-core/_latestVersion)
+
+# KMath
+Could be pronounced as `key-math`.
+The Kotlin MATHematics library  was initially intended as a Kotlin-based analog to Python's `numpy` library. Later we found that kotlin is much more flexible language and allows superior architecture designs. In contrast to `numpy` and `scipy` it is modular and has a lightweight core. The `numpy`-like experience could be achieved with [kmath-for-real](/kmath-for-real) extension module.
+
+## Publications and talks
+* [A conceptual article about context-oriented design](https://proandroiddev.com/an-introduction-context-oriented-programming-in-kotlin-2e79d316b0a2)
+* [Another article about context-oriented design](https://proandroiddev.com/diving-deeper-into-context-oriented-programming-in-kotlin-3ecb4ec38814)
+* [ACAT 2019 conference paper](https://aip.scitation.org/doi/abs/10.1063/1.5130103)
+
+# Goal
+* Provide a flexible and powerful API to work with mathematics abstractions in Kotlin-multiplatform (JVM and JS for now and Native in future). 
+* Provide basic multiplatform implementations for those abstractions (without significant performance optimization).
+* Provide bindings and wrappers with those abstractions for popular optimized platform libraries.
+
+## Non-goals
+* Be like Numpy. It was the idea at the beginning, but we decided that we can do better in terms of API.
+* Provide best performance out of the box. We have specialized libraries for that. Need only API wrappers for them.
+* Cover all cases as immediately and in one bundle. We will modularize everything and add new features gradually.
+* Provide specialized behavior in the core. API is made generic on purpose, so one needs to specialize for types, like for `Double` in the core. For that we will have specialization modules like `for-real`, which will give better experience for those, who want to work with specific types.
+
+## Features
+
+Actual feature list is [here](/docs/features.md)
+
+* **Algebra**
+    * Algebraic structures like rings, spaces and field (**TODO** add example to wiki)
+    * Basic linear algebra operations (sums, products, etc.), backed by the `Space` API.
+    * Complex numbers backed by the `Field` API (meaning that they will be usable in any structure like vectors and N-dimensional arrays).
+    * Advanced linear algebra operations like matrix inversion and LU decomposition.
+
+* **Array-like structures** Full support of many-dimensional array-like structures 
+including mixed arithmetic operations and function operations over arrays and numbers (with the added benefit of static type checking).
+
+* **Expressions** By writing a single mathematical expression
+once, users will be able to apply different types of objects to the expression by providing a context. Expressions
+can be used for a wide variety of purposes from high performance calculations to code generation.
+
+* **Histograms** Fast multi-dimensional histograms.
+
+* **Streaming** Streaming operations on mathematical objects and objects buffers.
+
+* **Type-safe dimensions** Type-safe dimensions for matrix operations.
+
+* **Commons-math wrapper** It is planned to gradually wrap most parts of [Apache commons-math](http://commons.apache.org/proper/commons-math/)
+                           library in Kotlin code and maybe rewrite some parts to better suit the Kotlin programming paradigm, however there is no fixed roadmap for that. Feel free
+                           to submit a feature request if you want something to be done first.
+                           
+## Planned features
+
+* **Messaging** A mathematical notation to support multi-language and multi-node communication for mathematical tasks.
+
+* **Array statistics** 
+
+* **Integration** Univariate and multivariate integration framework.
+
+* **Probability and distributions**
+
+* **Fitting** Non-linear curve fitting facilities
+
+## Modules
+
+$modules
+
+## Multi-platform support
+
+KMath is developed as a multi-platform library, which means that most of the interfaces are declared in the [common module](/kmath-core/src/commonMain). Implementation is also done in the common module wherever possible. In some cases, features are delegated to platform-specific implementations even if they could be done in the common module for performance reasons. Currently, the JVM is the main focus of development, however Kotlin/Native and Kotlin/JS contributions are also welcome.
+
+## Performance
+
+Calculation performance is one of major goals of KMath in the future, but in some cases it is not possible to achieve both performance and flexibility. We expect to focus on creating convenient universal API first and then work on increasing performance for specific cases. We expect the worst KMath benchmarks will perform better than native Python, but worse than optimized native/SciPy (mostly due to boxing operations on primitive numbers). The best performance of optimized parts could be better than SciPy.
+
+### Dependency
+
+Release artifacts are accessible from bintray with following configuration (see documentation for [kotlin-multiplatform](https://kotlinlang.org/docs/reference/multiplatform.html) form more details):
+
+```kotlin
+repositories{
+    maven("https://dl.bintray.com/mipt-npm/kscience")
+}
+
+dependencies{
+    api("kscience.kmath:kmath-core:$version")
+    //api("kscience.kmath:kmath-core-jvm:$version") for jvm-specific version
+}
+```
+
+Gradle `6.0+` is required for multiplatform artifacts.
+
+### Development
+
+Development builds are accessible from the reposirtory 
+```kotlin
+repositories{
+    maven("https://dl.bintray.com/mipt-npm/dev")
+}
+```
+with the same artifact names.
+
+## Contributing
+
+The project requires a lot of additional work. Please feel free to contribute in any way and propose new features.

examples/build.gradle.kts

@@ -3,8 +3,8 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 plugins {
     java
     kotlin("jvm")
-    kotlin("plugin.allopen") version "1.4.20-dev-3898-14"
+    kotlin("plugin.allopen")
-    id("kotlinx.benchmark") version "0.2.0-dev-20"
+    id("kotlinx.benchmark")
 }
 
 allOpen.annotation("org.openjdk.jmh.annotations.State")
@@ -26,8 +26,7 @@ dependencies {
     implementation(project(":kmath-prob"))
     implementation(project(":kmath-viktor"))
     implementation(project(":kmath-dimensions"))
-    implementation(project(":kmath-nd4j"))
+    implementation("org.jetbrains.kotlinx:kotlinx-io:0.2.0-npm-dev-11")
-    implementation("org.jetbrains.kotlinx:kotlinx-io-jvm:0.2.0-npm-dev-6")
     implementation("org.jetbrains.kotlinx:kotlinx.benchmark.runtime:0.2.0-dev-20")
     implementation("org.slf4j:slf4j-simple:1.7.30")
     implementation("org.nd4j:nd4j-native-platform:1.0.0-beta7")
@@ -38,9 +37,8 @@ dependencies {
 // Configure benchmark
 benchmark {
     // Setup configurations
-    targets
+    targets.register("benchmarks")
-        // This one matches sourceSet name above
+    // This one matches sourceSet name above
-        .register("benchmarks")
 
     configurations.register("fast") {
         warmups = 5 // number of warmup iterations

gradle.properties

@@ -0,0 +1,9 @@
+kotlin.code.style=official
+kotlin.parallel.tasks.in.project=true
+kotlin.mpp.enableGranularSourceSetsMetadata=true
+kotlin.native.enableDependencyPropagation=false
+kotlin.mpp.stability.nowarn=true
+
+org.gradle.jvmargs=-XX:MaxMetaspaceSize=512m
+org.gradle.parallel=true
+systemProp.org.gradle.internal.publish.checksums.insecure=true

kmath-ast/src/jvmMain/kotlin/kscience/kmath/asm/asm.kt

@@ -19,39 +19,37 @@ import kotlin.reflect.KClass
  * @author Alexander Nozik
  */
 public fun <T : Any> MST.compileWith(type: KClass<T>, algebra: Algebra<T>): Expression<T> {
-    fun AsmBuilder<T>.visit(node: MST) {
+    fun AsmBuilder<T>.visit(node: MST): Unit = when (node) {
-        when (node) {
+        is MST.Symbolic -> {
-            is MST.Symbolic -> {
+            val symbol = try {
-                val symbol = try {
+                algebra.symbol(node.value)
-                    algebra.symbol(node.value)
+            } catch (ignored: Throwable) {
-                } catch (ignored: Throwable) {
+                null
-                    null
-                }
-
-                if (symbol != null)
-                    loadTConstant(symbol)
-                else
-                    loadVariable(node.value)
             }
 
-            is MST.Numeric -> loadNumeric(node.value)
+            if (symbol != null)
+                loadTConstant(symbol)
+            else
+                loadVariable(node.value)
+        }
 
-            is MST.Unary -> buildAlgebraOperationCall(
+        is MST.Numeric -> loadNumeric(node.value)
-                context = algebra,
-                name = node.operation,
-                fallbackMethodName = "unaryOperation",
-                parameterTypes = arrayOf(MstType.fromMst(node.value))
-            ) { visit(node.value) }
 
-            is MST.Binary -> buildAlgebraOperationCall(
+        is MST.Unary -> buildAlgebraOperationCall(
-                context = algebra,
+            context = algebra,
-                name = node.operation,
+            name = node.operation,
-                fallbackMethodName = "binaryOperation",
+            fallbackMethodName = "unaryOperation",
-                parameterTypes = arrayOf(MstType.fromMst(node.left), MstType.fromMst(node.right))
+            parameterTypes = arrayOf(MstType.fromMst(node.value))
-            ) {
+        ) { visit(node.value) }
-                visit(node.left)
+
-                visit(node.right)
+        is MST.Binary -> buildAlgebraOperationCall(
-            }
+            context = algebra,
+            name = node.operation,
+            fallbackMethodName = "binaryOperation",
+            parameterTypes = arrayOf(MstType.fromMst(node.left), MstType.fromMst(node.right))
+        ) {
+            visit(node.left)
+            visit(node.right)
         }
     }
 

kmath-commons/src/main/kotlin/kscience/kmath/commons/expressions/DiffExpression.kt

@@ -94,7 +94,7 @@ public class DiffExpression(public val function: DerivativeStructureField.() ->
      * TODO make result [DiffExpression]
      */
     public fun derivative(orders: Map<String, Int>): Expression<Double> = Expression { arguments ->
-        (DerivativeStructureField(orders.values.max() ?: 0, arguments)) { function().deriv(orders) }
+        (DerivativeStructureField(orders.values.maxOrNull() ?: 0, arguments)) { function().deriv(orders) }
     }
 
     //TODO add gradient and maybe other vector operators

kmath-core/README.md

@@ -2,15 +2,21 @@
 
 The core features of KMath:
 
-- Algebraic structures: contexts and elements.
+ - [algebras](src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt) : Algebraic structures: contexts and elements
-- ND structures.
+ - [nd](src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt) : Many-dimensional structures
-- Buffers.
+ - [buffers](src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt) : One-dimensional structure
-- Functional Expressions.
+ - [expressions](src/commonMain/kotlin/kscience/kmath/expressions) : Functional Expressions
-- Domains.
+ - [domains](src/commonMain/kotlin/kscience/kmath/domains) : Domains
-- Automatic differentiation.
+ - [autodif](src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt) : Automatic differentiation
+
 
 > #### Artifact:
-> This module is distributed in the artifact `kscience.kmath:kmath-core:0.1.4-dev-8`.
+>
+> This module artifact: `kscience.kmath:kmath-core:0.2.0-dev-1`.
+>
+> Bintray release version:        [ ![Download](https://api.bintray.com/packages/mipt-npm/kscience/kmath-core/images/download.svg) ](https://bintray.com/mipt-npm/kscience/kmath-core/_latestVersion)
+>
+> Bintray development version:    [ ![Download](https://api.bintray.com/packages/mipt-npm/dev/kmath-core/images/download.svg) ](https://bintray.com/mipt-npm/dev/kmath-core/_latestVersion)
 >
 > **Gradle:**
 >
@@ -18,11 +24,11 @@ The core features of KMath:
 > repositories {
 >     maven { url 'https://dl.bintray.com/mipt-npm/kscience' }
 >     maven { url 'https://dl.bintray.com/mipt-npm/dev' }
->     maven { url https://dl.bintray.com/hotkeytlt/maven' }
+>     maven { url 'https://dl.bintray.com/hotkeytlt/maven' }
 > }
 > 
 > dependencies {
->     implementation 'kscience.kmath:kmath-core:0.1.4-dev-8'
+>     implementation 'kscience.kmath:kmath-core:0.2.0-dev-1'
 > }
 > ```
 > **Gradle Kotlin DSL:**
@@ -35,6 +41,6 @@ The core features of KMath:
 > }
 > 
 > dependencies {
->     implementation("kscience.kmath:kmath-core:0.1.4-dev-8")
+>     implementation("kscience.kmath:kmath-core:0.2.0-dev-1")
 > }
 > ```

kmath-core/build.gradle.kts

@@ -1,7 +1,46 @@
-plugins { id("ru.mipt.npm.mpp") }
+plugins {
+    id("ru.mipt.npm.mpp")
+    id("ru.mipt.npm.native")
+}
 
 kotlin.sourceSets.commonMain {
     dependencies {
         api(project(":kmath-memory"))
     }
 }
+
+readme {
+    description = "Core classes, algebra definitions, basic linear algebra"
+    maturity = ru.mipt.npm.gradle.Maturity.DEVELOPMENT
+    propertyByTemplate("artifact", rootProject.file("docs/templates/ARTIFACT-TEMPLATE.md"))
+    feature(
+        id = "algebras",
+        description = "Algebraic structures: contexts and elements",
+        ref = "src/commonMain/kotlin/kscience/kmath/operations/Algebra.kt"
+    )
+    feature(
+        id = "nd",
+        description = "Many-dimensional structures",
+        ref = "src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt"
+    )
+    feature(
+        id = "buffers",
+        description = "One-dimensional structure",
+        ref = "src/commonMain/kotlin/kscience/kmath/structures/Buffers.kt"
+    )
+    feature(
+        id = "expressions",
+        description = "Functional Expressions",
+        ref = "src/commonMain/kotlin/kscience/kmath/expressions"
+    )
+    feature(
+        id = "domains",
+        description = "Domains",
+        ref = "src/commonMain/kotlin/kscience/kmath/domains"
+    )
+    feature(
+        id = "autodif",
+        description = "Automatic differentiation",
+        ref = "src/commonMain/kotlin/kscience/kmath/misc/AutoDiff.kt"
+    )
+}

kmath-core/docs/README-TEMPLATE.md

@@ -0,0 +1,7 @@
+# The Core Module (`kmath-core`)
+
+The core features of KMath:
+
+${features}
+
+${artifact}

kmath-core/src/commonMain/kotlin/kscience/kmath/operations/Complex.kt

@@ -1,11 +1,11 @@
 package kscience.kmath.operations
 
+import kscience.kmath.memory.MemoryReader
+import kscience.kmath.memory.MemorySpec
+import kscience.kmath.memory.MemoryWriter
 import kscience.kmath.structures.Buffer
 import kscience.kmath.structures.MemoryBuffer
 import kscience.kmath.structures.MutableBuffer
-import kscience.memory.MemoryReader
-import kscience.memory.MemorySpec
-import kscience.memory.MemoryWriter
 import kotlin.math.*
 
 /**

kmath-core/src/commonMain/kotlin/kscience/kmath/structures/MemoryBuffer.kt

@@ -1,6 +1,6 @@
 package kscience.kmath.structures
 
-import kscience.memory.*
+import kscience.kmath.memory.*
 
 /**
  * A non-boxing buffer over [Memory] object.

kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDAlgebra.kt

@@ -4,6 +4,7 @@ import kscience.kmath.operations.Complex
 import kscience.kmath.operations.Field
 import kscience.kmath.operations.Ring
 import kscience.kmath.operations.Space
+import kotlin.native.concurrent.ThreadLocal
 
 /**
  * An exception is thrown when the expected ans actual shape of NDArray differs.
@@ -226,6 +227,7 @@ public interface NDField<T, F : Field<T>, N : NDStructure<T>> : Field<N>, NDRing
      */
     public operator fun T.div(arg: N): N = map(arg) { divide(it, this@div) }
 
+    @ThreadLocal
     public companion object {
         private val realNDFieldCache: MutableMap<IntArray, RealNDField> = hashMapOf()
 

kmath-core/src/commonMain/kotlin/kscience/kmath/structures/NDStructure.kt

@@ -1,6 +1,7 @@
 package kscience.kmath.structures
 
 import kotlin.jvm.JvmName
+import kotlin.native.concurrent.ThreadLocal
 import kotlin.reflect.KClass
 
 /**
@@ -230,6 +231,7 @@ public class DefaultStrides private constructor(override val shape: IntArray) :
 
     override fun hashCode(): Int = shape.contentHashCode()
 
+    @ThreadLocal
     public companion object {
         private val defaultStridesCache = HashMap<IntArray, Strides>()
 

kmath-core/src/commonTest/kotlin/kscience/kmath/operations/ComplexTest.kt

@@ -2,6 +2,7 @@ package kscience.kmath.operations
 
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertTrue
 
 internal class ComplexTest {
     @Test
@@ -13,7 +14,7 @@ internal class ComplexTest {
 
     @Test
     fun reciprocal() {
-        assertEquals(Complex(0.5, -0.0), 2.toComplex().reciprocal)
+        assertTrue { (Complex(0.5, -0.0) - 2.toComplex().reciprocal).r < 1e-10}
     }
 
     @Test

kmath-dimensions/build.gradle.kts

@@ -1,4 +1,7 @@
-plugins { id("ru.mipt.npm.mpp") }
+plugins {
+    id("ru.mipt.npm.mpp")
+    id("ru.mipt.npm.native")
+}
 
 description = "A proof of concept module for adding type-safe dimensions to structures"
 

kmath-dimensions/src/nativeMain/kotlin/kscience/kmath/dimensions/dimNative.kt

@@ -0,0 +1,20 @@
+package kscience.kmath.dimensions
+
+import kotlin.native.concurrent.ThreadLocal
+import kotlin.reflect.KClass
+
+@ThreadLocal
+private val dimensionMap: MutableMap<UInt, Dimension> = hashMapOf(1u to D1, 2u to D2, 3u to D3)
+
+@Suppress("UNCHECKED_CAST")
+public actual fun <D : Dimension> Dimension.Companion.resolve(type: KClass<D>): D = dimensionMap
+    .entries
+    .map(MutableMap.MutableEntry<UInt, Dimension>::value)
+    .find { it::class == type } as? D
+    ?: error("Can't resolve dimension $type")
+
+public actual fun Dimension.Companion.of(dim: UInt): Dimension = dimensionMap.getOrPut(dim) {
+    object : Dimension {
+        override val dim: UInt get() = dim
+    }
+}

kmath-memory/build.gradle.kts

@@ -1 +1,4 @@
-plugins { id("ru.mipt.npm.mpp") }
+plugins {
+    id("ru.mipt.npm.mpp")
+    id("ru.mipt.npm.native")
+}

kmath-memory/src/commonMain/kotlin/kscience/kmath/memory/Memory.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 import kotlin.contracts.InvocationKind
 import kotlin.contracts.contract

kmath-memory/src/commonMain/kotlin/kscience/kmath/memory/MemorySpec.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 /**
  * A specification to read or write custom objects with fixed size in bytes.

kmath-memory/src/jsMain/kotlin/kscience/kmath/memory/DataViewMemory.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 import org.khronos.webgl.ArrayBuffer
 import org.khronos.webgl.DataView

kmath-memory/src/jvmMain/kotlin/kscience/kmath/memory/ByteBufferMemory.kt

@@ -1,4 +1,4 @@
-package kscience.memory
+package kscience.kmath.memory
 
 import java.io.IOException
 import java.nio.ByteBuffer

kmath-memory/src/nativeMain/kotlin/kscience/kmath/memory/NativeMemory.kt

@@ -0,0 +1,93 @@
+package kscience.kmath.memory
+
+@PublishedApi
+internal class NativeMemory(
+    val array: ByteArray,
+    val startOffset: Int = 0,
+    override val size: Int = array.size
+) : Memory {
+    @Suppress("NOTHING_TO_INLINE")
+    private inline fun position(o: Int): Int = startOffset + o
+
+    override fun view(offset: Int, length: Int): Memory {
+        require(offset >= 0) { "offset shouldn't be negative: $offset" }
+        require(length >= 0) { "length shouldn't be negative: $length" }
+        require(offset + length <= size) { "Can't view memory outside the parent region." }
+        return NativeMemory(array, position(offset), length)
+    }
+
+    override fun copy(): Memory {
+        val copy = array.copyOfRange(startOffset, startOffset + size)
+        return NativeMemory(copy)
+    }
+
+    private val reader: MemoryReader = object : MemoryReader {
+        override val memory: Memory get() = this@NativeMemory
+
+        override fun readDouble(offset: Int) = array.getDoubleAt(position(offset))
+
+        override fun readFloat(offset: Int) = array.getFloatAt(position(offset))
+
+        override fun readByte(offset: Int) = array[position(offset)]
+
+        override fun readShort(offset: Int) = array.getShortAt(position(offset))
+
+        override fun readInt(offset: Int) = array.getIntAt(position(offset))
+
+        override fun readLong(offset: Int) = array.getLongAt(position(offset))
+
+        override fun release() {
+            // does nothing on JVM
+        }
+    }
+
+    override fun reader(): MemoryReader = reader
+
+    private val writer: MemoryWriter = object : MemoryWriter {
+        override val memory: Memory get() = this@NativeMemory
+
+        override fun writeDouble(offset: Int, value: Double) {
+            array.setDoubleAt(position(offset), value)
+        }
+
+        override fun writeFloat(offset: Int, value: Float) {
+            array.setFloatAt(position(offset), value)
+        }
+
+        override fun writeByte(offset: Int, value: Byte) {
+            array.set(position(offset), value)
+        }
+
+        override fun writeShort(offset: Int, value: Short) {
+            array.setShortAt(position(offset), value)
+        }
+
+        override fun writeInt(offset: Int, value: Int) {
+            array.setIntAt(position(offset), value)
+        }
+
+        override fun writeLong(offset: Int, value: Long) {
+            array.setLongAt(position(offset), value)
+        }
+
+        override fun release() {
+            // does nothing on JVM
+        }
+    }
+
+    override fun writer(): MemoryWriter = writer
+}
+
+/**
+ * Wraps a [Memory] around existing [ByteArray]. This operation is unsafe since the array is not copied
+ * and could be mutated independently from the resulting [Memory].
+ */
+public actual fun Memory.Companion.wrap(array: ByteArray): Memory = NativeMemory(array)
+
+/**
+ * Allocates the most effective platform-specific memory.
+ */
+public actual fun Memory.Companion.allocate(length: Int): Memory {
+    val array = ByteArray(length)
+    return NativeMemory(array)
+}

settings.gradle.kts

@@ -1,15 +1,4 @@
 pluginManagement {
-    val toolsVersion = "0.6.0"
-
-    plugins {
-        id("kotlinx.benchmark") version "0.2.0-dev-20"
-        id("ru.mipt.npm.base") version toolsVersion
-        id("ru.mipt.npm.mpp") version toolsVersion
-        id("ru.mipt.npm.jvm") version toolsVersion
-        id("ru.mipt.npm.publish") version toolsVersion
-        kotlin("plugin.allopen")
-    }
-
     repositories {
         mavenLocal()
         jcenter()
@@ -20,22 +9,33 @@ pluginManagement {
         maven("https://dl.bintray.com/kotlin/kotlinx")
         maven("https://dl.bintray.com/kotlin/kotlin-dev/")
     }
+
+    val toolsVersion = "0.6.1-dev-1.4.20-M1"
+    val kotlinVersion = "1.4.20-M1"
+
+    plugins {
+        id("kotlinx.benchmark") version "0.2.0-dev-20"
+        id("ru.mipt.npm.project") version toolsVersion
+        id("ru.mipt.npm.mpp") version toolsVersion
+        id("ru.mipt.npm.jvm") version toolsVersion
+        id("ru.mipt.npm.publish") version toolsVersion
+        kotlin("jvm")  version kotlinVersion
+        kotlin("plugin.allopen") version kotlinVersion
+    }
 }
 
 rootProject.name = "kmath"
+
 include(
     ":kmath-memory",
     ":kmath-core",
     ":kmath-functions",
-//    ":kmath-io",
     ":kmath-coroutines",
     ":kmath-histograms",
     ":kmath-commons",
     ":kmath-viktor",
-    ":kmath-koma",
-    ":kmath-nd4j",
     ":kmath-prob",
-    ":kmath-io",
+    ":kmath-nd4j",
     ":kmath-dimensions",
     ":kmath-for-real",
     ":kmath-geometry",