diff --git a/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/MatrixContext.kt b/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/MatrixContext.kt
index 8766f2e5f..234435b29 100644
--- a/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/MatrixContext.kt
+++ b/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/MatrixContext.kt
@@ -9,7 +9,10 @@ import kscience.kmath.structures.BufferFactory
 import kscience.kmath.structures.asSequence
 
 /**
- * Basic operations on matrices. Operates on [Matrix]
+ * Basic operations on matrices. Operates on [Matrix].
+ *
+ * @param T the type of items in the matrices.
+ * @param M the type of operated matrices.
  */
 public interface MatrixContext<T : Any, out M : Matrix<T>> : SpaceOperations<Matrix<T>> {
     /**
@@ -83,9 +86,16 @@ public interface MatrixContext<T : Any, out M : Matrix<T>> : SpaceOperations<Mat
     }
 }
 
+/**
+ * Partial implementation of [MatrixContext] for matrices of [Ring].
+ *
+ * @param T the type of items in the matrices.
+ * @param R the type of ring of matrix elements.
+ * @param M the type of operated matrices.
+ */
 public interface GenericMatrixContext<T : Any, R : Ring<T>, out M : Matrix<T>> : MatrixContext<T, M> {
     /**
-     * The ring context for matrix elements
+     * The ring over matrix elements.
      */
     public val elementContext: R
 
diff --git a/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/VirtualMatrix.kt b/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/VirtualMatrix.kt
index df4e4de09..c96e55be6 100644
--- a/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/VirtualMatrix.kt
+++ b/kmath-core/src/commonMain/kotlin/kscience/kmath/linear/VirtualMatrix.kt
@@ -1,5 +1,10 @@
 package kscience.kmath.linear
 
+/**
+ * The matrix where each element is evaluated each time when is being accessed.
+ *
+ * @property generator the function that provides elements.
+ */
 public class VirtualMatrix<T : Any>(
     override val rowNum: Int,
     override val colNum: Int,
diff --git a/kmath-core/src/commonMain/kotlin/kscience/kmath/nd/Structure2D.kt b/kmath-core/src/commonMain/kotlin/kscience/kmath/nd/Structure2D.kt
index 32e0704fc..e2694309a 100644
--- a/kmath-core/src/commonMain/kotlin/kscience/kmath/nd/Structure2D.kt
+++ b/kmath-core/src/commonMain/kotlin/kscience/kmath/nd/Structure2D.kt
@@ -86,3 +86,10 @@ public fun <T> NDStructure<T>.as2D(): Structure2D<T> = if (shape.size == 2)
     Structure2DWrapper(this)
 else
     error("Can't create 2d-structure from ${shape.size}d-structure")
+
+/**
+ * Alias for [Structure2D] with more familiar name.
+ *
+ * @param T the type of items in the matrix.
+ */
+public typealias Matrix<T> = Structure2D<T>