diff --git a/kmath-core/api/kmath-core.api b/kmath-core/api/kmath-core.api
index ead4b96b5..b424b59ff 100644
--- a/kmath-core/api/kmath-core.api
+++ b/kmath-core/api/kmath-core.api
@@ -522,6 +522,11 @@ public final class space/kscience/kmath/linear/LFeature : space/kscience/kmath/l
 	public static final field INSTANCE Lspace/kscience/kmath/linear/LFeature;
 }
 
+public abstract interface class space/kscience/kmath/linear/LUDecompositionFeature : space/kscience/kmath/linear/MatrixFeature {
+	public abstract fun getL ()Lspace/kscience/kmath/nd/Structure2D;
+	public abstract fun getU ()Lspace/kscience/kmath/nd/Structure2D;
+}
+
 public abstract interface class space/kscience/kmath/linear/LinearSolver {
 	public abstract fun inverse (Lspace/kscience/kmath/nd/Structure2D;)Lspace/kscience/kmath/nd/Structure2D;
 	public abstract fun solve (Lspace/kscience/kmath/nd/Structure2D;Lspace/kscience/kmath/nd/Structure2D;)Lspace/kscience/kmath/nd/Structure2D;
diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt
index fb2e38449..4729f19ea 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt
@@ -177,4 +177,6 @@ public object MstLogicAlgebra : LogicAlgebra<MST> {
     override fun MST.and(other: MST): MST = MST.Binary(Boolean::and.name, this, other)
 
     override fun MST.or(other: MST): MST  = MST.Binary(Boolean::or.name, this, other)
+
+    override fun MST.xor(other: MST): MST  = MST.Binary(Boolean::xor.name, this, other)
 }
diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/LogicAlgebra.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/LogicAlgebra.kt
index 406967897..9037525e1 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/LogicAlgebra.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/operations/LogicAlgebra.kt
@@ -54,6 +54,12 @@ public interface LogicAlgebra<T : Any> : Algebra<T> {
      */
     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
@@ -74,4 +80,6 @@ public object BooleanAlgebra : LogicAlgebra<Boolean> {
     override fun Boolean.and(other: Boolean): Boolean = this && other
 
     override fun Boolean.or(other: Boolean): Boolean = this || other
+
+    override fun Boolean.xor(other: Boolean): Boolean = this xor other
 }
\ No newline at end of file