# KMath
Kotlin MATHematics library is intended as a kotlin based analog of numpy python library. Contrary to `numpy`
and `scipy` it is modular and has a lightweight core.

## Features

* **Algebra**
    * Mathematical operation entities like rings, spaces and fields with (**TODO** add example to wiki) 
    * Basic linear algebra operations (sums products, etc) backed by `Space` API.
    * [In progress] advanced linear algebra operations like matrix inversions.
* **Array-like structures** Full support of numpy-like ndarray including mixed arithmetic operations and function operations
on arrays and numbers just like it works in python (with benefit of static type checking).

* **Expressions** Expressions are one of the ultimate goals of kmath. It is planned to be able to write some mathematical
expression once an then apply it to different types of objects by providing different context. Exception could be used
for a wide variety of purposes from high performance calculations to code generation.

## Planned features

* **Common mathematics** 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 suite kotlin programming paradigm. There is no fixed priority list for that. Feel free
to submit a future request if you want something to be done first.

* **Messaging** A mathematical notation to support multilanguage and multinod communication for mathematical tasks.

## Multi-platform support
KMath is developed as a multi-platform library, which means that most of interfaces are declared in common module.
Implementation is also done in common module wherever it is possible. In some cases features are delegated to 
platform even if they could be done in common module because of platform performance optimization. 
Currently the main focus of development is the JVM platform, contribution of implementations for Kotlin - Native and
Kotlin - JS is welcome. 

It is planned to move project structure to [kotlin gradle mpp structure](https://github.com/h0tk3y/k-new-mpp-samples) after release of kotlin 1.3. 

## Performance
The 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 firstly focus on creating convenient universal API and then work on 
increasing performance for specific cases. We expect the worst KMath performance still be better than natural python,
but worse than optimized native/scipy (mostly due to boxing operations on primitive numbers). The best performance 
of optimized parts should be better than scipy.

## Releases

The project is currently in pre-release stage. Nightly builds could be used by adding additional repository to (groovy) gradle config:
```groovy
repositories {
    maven { url = "http://npm.mipt.ru:8081/artifactory/gradle-dev" }
    mavenCentral()
} 
```
or for kotlin gradle dsl:

```kotlin
repositories {
    maven { setUrl("http://npm.mipt.ru:8081/artifactory/gradle-dev") }
    mavenCentral()
} 
```

Then use regular dependency like
```groovy
compile(group: 'scientifik', name: 'kmath-core-jvm', version: '0.0.1-SNAPSHOT')
```
or in kotlin
```kotlin
compile(group = "scientifik", name = "kmath-core-jvm", version = "0.0.1-SNAPSHOT")
```

Work builds could be obtained with [![](https://jitpack.io/v/altavir/kmath.svg)](https://jitpack.io/#altavir/kmath). 

## Contributing
The project requires a lot of additional work. Please fill free to contribute in any way and propose new features.