kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt

@@ -167,9 +167,9 @@ public object MstLogicAlgebra : LogicAlgebra<MST> {
     override fun bindSymbolOrNull(value: String): MST = super.bindSymbolOrNull(value) ?: StringSymbol(value)
 
     override fun const(boolean: Boolean): Symbol = if (boolean) {
-        LogicAlgebra.TRUE
+        BinaryLogic.TRUE
     } else {
-        LogicAlgebra.FALSE
+        BinaryLogic.FALSE
     }
 
     override fun MST.not(): MST = MST.Unary(Boolean::not.name, this)

kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/BinaryLogic.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018-2021 KMath contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package space.kscience.kmath.operations
+
+import space.kscience.kmath.expressions.Symbol
+import space.kscience.kmath.expressions.symbol
+
+ interface BinaryLogic<T : Any> {
+    /**
+     * Logic 'not'
+     */
+    public operator fun T.not(): T
+
+    /**
+     * Logic 'and'
+     */
+    public infix fun T.and(other: T): T
+
+    /**
+     * Logic 'or'
+     */
+    public infix fun T.or(other: T): T
+
+    /**
+     * Logic 'xor'
+     */
+    public infix fun T.xor(other: T): T
+
+    companion object {
+        public val TRUE: Symbol by symbol
+        public val FALSE: Symbol by symbol
+    }
+}

kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/LogicAlgebra.kt

@@ -5,16 +5,13 @@
 
 package space.kscience.kmath.operations
 
-import space.kscience.kmath.expressions.Symbol
-import space.kscience.kmath.expressions.symbol
 import space.kscience.kmath.misc.UnstableKMathAPI
 
 /**
  * An algebra for generic boolean logic
  */
 @UnstableKMathAPI
-public interface LogicAlgebra<T : Any> : Algebra<T> {
-
+public interface LogicAlgebra<T : Any> : Algebra<T>, BinaryLogic<T> {
     /**
      * Represent constant [Boolean] as [T]
      */
@@ -38,32 +35,6 @@ public interface LogicAlgebra<T : Any> : Algebra<T> {
     override fun binaryOperationFunction(operation: String): (left: T, right: T) -> T = { l, r ->
         binaryOperation(operation, l, r)
     }
-
-    /**
-     * Logic 'not'
-     */
-    public operator fun T.not(): T
-
-    /**
-     * Logic 'and'
-     */
-    public infix fun T.and(other: T): T
-
-    /**
-     * Logic 'or'
-     */
-    public infix fun T.or(other: T): T
-
-    /**
-     * Logic 'xor'
-     */
-    public infix fun T.xor(other: T): T
-
-
-    public companion object {
-        public val TRUE: Symbol by symbol
-        public val FALSE: Symbol by symbol
-    }
 }
 
 /**

kmath-tensorflow/src/main/kotlin/space/kscience/kmath/tensorflow/tfOperations.kt

@@ -21,3 +21,11 @@ public fun <T, TT : TNumber, A> TensorFlowAlgebra<T, TT, A>.sin(
 public fun <T, TT : TNumber, A> TensorFlowAlgebra<T, TT, A>.cos(
     arg: StructureND<T>,
 ): TensorFlowOutput<T, TT> where A : TrigonometricOperations<T>, A : Ring<T> = arg.operate { ops.math.cos(it) }
+
+public fun <T, TT : TNumber, A> TensorFlowAlgebra<T, TT, A>.tan(
+    arg: StructureND<T>,
+): TensorFlowOutput<T, TT> where A : TrigonometricOperations<T>, A : Ring<T> = arg.operate { ops.math.tan(it) }
+
+public fun <T, TT : TNumber, A> TensorFlowAlgebra<T, TT, A>.abs(
+    arg: StructureND<T>,
+): TensorFlowOutput<T, TT> where A : TrigonometricOperations<T>, A : Ring<T> = arg.operate { ops.math.abs(it) }