diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/TensorAlgebra.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/TensorAlgebra.kt
index 1673657d3..e41b7546c 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/TensorAlgebra.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/TensorAlgebra.kt
@@ -6,12 +6,13 @@ public interface TensorAlgebra<T, TensorType : TensorStructure<T>> {
     //https://pytorch.org/docs/stable/generated/torch.full.html
     public fun full(value: T, shape: IntArray): TensorType
 
+    public fun ones(shape: IntArray): TensorType
+    public fun zeros(shape: IntArray): TensorType
+
     //https://pytorch.org/docs/stable/generated/torch.full_like.html#torch.full_like
     public fun TensorType.fullLike(value: T): TensorType
 
-    public fun zeros(shape: IntArray): TensorType
-    public fun TensorType.zeroesLike(): TensorType // mb it shouldn't be tensor but algebra method (like in numpy/torch) ?
-    public fun ones(shape: IntArray): TensorType
+    public fun TensorType.zeroesLike(): TensorType
     public fun TensorType.onesLike(): TensorType
 
     //https://pytorch.org/docs/stable/generated/torch.eye.html
diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/BufferedTensor.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/BufferedTensor.kt
index cbfb15be0..5a0fc6c75 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/BufferedTensor.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/BufferedTensor.kt
@@ -33,28 +33,6 @@ public open class BufferedTensor<T>(
 
     override fun hashCode(): Int = 0
 
-    // todo rename to vector
-    public inline fun forEachVector(vectorAction : (MutableStructure1D<T>) -> Unit): Unit {
-        check(shape.size >= 1) {"todo"}
-        val vectorOffset = strides.strides[0]
-        val vectorShape = intArrayOf(shape.last())
-        for (offset in 0 until numel step vectorOffset) {
-            val vector = BufferedTensor<T>(vectorShape, buffer, offset).as1D()
-            vectorAction(vector)
-        }
-    }
-
-    public inline fun forEachMatrix(matrixAction : (MutableStructure2D<T>) -> Unit): Unit {
-        check(shape.size >= 2) {"todo"}
-        val matrixOffset = strides.strides[1]
-        val matrixShape = intArrayOf(shape[shape.size - 2], shape.last()) //todo better way?
-        for (offset in 0 until numel step matrixOffset) {
-            val matrix = BufferedTensor<T>(matrixShape, buffer, offset).as2D()
-            matrixAction(matrix)
-        }
-    }
-    // todo remove code copy-pasting
-
     public fun vectorSequence(): Sequence<MutableStructure1D<T>> = sequence {
         check(shape.size >= 1) {"todo"}
         val vectorOffset = strides.strides[0]
@@ -75,6 +53,18 @@ public open class BufferedTensor<T>(
         }
     }
 
+    public inline fun forEachVector(vectorAction : (MutableStructure1D<T>) -> Unit): Unit {
+        for (vector in vectorSequence()){
+            vectorAction(vector)
+        }
+    }
+
+    public inline fun forEachMatrix(matrixAction : (MutableStructure2D<T>) -> Unit): Unit {
+        for (matrix in matrixSequence()){
+            matrixAction(matrix)
+        }
+    }
+
 }
 
 
diff --git a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
index 1c156b4e3..465c2ddc1 100644
--- a/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
+++ b/kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
@@ -20,24 +20,41 @@ public open class DoubleTensorAlgebra : TensorPartialDivisionAlgebra<Double, Dou
         return DoubleTensor(newShape, this.buffer.array(), newStart)
     }
 
+<<<<<<< HEAD:kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/DoubleTensorAlgebra.kt
+    override fun full(shape: IntArray, value: Double): DoubleTensor {
+        val buffer = DoubleArray(TensorStrides(shape).linearSize) { value }
+        return DoubleTensor(shape, buffer)
+    }
+
+    override fun zeros(shape: IntArray): DoubleTensor = full(shape, 0.0)
+
+    override fun ones(shape: IntArray): DoubleTensor = full(shape, 1.0)
+
+=======
     override fun full(value: Double, shape: IntArray): DoubleTensor {
         checkEmptyShape(shape)
         val buffer = DoubleArray(shape.reduce(Int::times)) { value }
         return DoubleTensor(shape, buffer)
     }
 
+>>>>>>> ups/feature/tensor-algebra:kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
     override fun DoubleTensor.fullLike(value: Double): DoubleTensor {
         val shape = this.shape
         val buffer = DoubleArray(this.strides.linearSize) { value }
         return DoubleTensor(shape, buffer)
     }
 
+<<<<<<< HEAD:kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/DoubleTensorAlgebra.kt
+    override fun DoubleTensor.zeroesLike(): DoubleTensor = this.fullLike(0.0)
+
+=======
     override fun zeros(shape: IntArray): DoubleTensor = full(0.0, shape)
 
     override fun DoubleTensor.zeroesLike(): DoubleTensor = this.fullLike(0.0)
 
     override fun ones(shape: IntArray): DoubleTensor = full(1.0, shape)
 
+>>>>>>> ups/feature/tensor-algebra:kmath-core/src/commonMain/kotlin/space/kscience/kmath/tensors/core/DoubleTensorAlgebra.kt
     override fun DoubleTensor.onesLike(): DoubleTensor = this.fullLike(1.0)
 
     override fun eye(n: Int): DoubleTensor {