diff --git a/src/Numerics/LinearAlgebra/Complex/Matrix.cs b/src/Numerics/LinearAlgebra/Complex/Matrix.cs
index 5d0524ac..454b4076 100644
--- a/src/Numerics/LinearAlgebra/Complex/Matrix.cs
+++ b/src/Numerics/LinearAlgebra/Complex/Matrix.cs
@@ -228,7 +228,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex
         {
             CommonParallel.For(
                 0,
-                RowCount,
+                ColumnCount,
                 j =>
                 {
                     var s = new Complex();
diff --git a/src/Numerics/LinearAlgebra/Complex32/Matrix.cs b/src/Numerics/LinearAlgebra/Complex32/Matrix.cs
index 407d3c05..2bc17206 100644
--- a/src/Numerics/LinearAlgebra/Complex32/Matrix.cs
+++ b/src/Numerics/LinearAlgebra/Complex32/Matrix.cs
@@ -238,7 +238,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32
         {
             CommonParallel.For(
                 0,
-                RowCount,
+                ColumnCount,
                 j =>
                 {
                     var s = new Complex32();
diff --git a/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs b/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
index 8e2d0a39..d1c85275 100644
--- a/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
+++ b/src/Numerics/LinearAlgebra/Double/DenseMatrix.cs
@@ -386,7 +386,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
                     1.0,
                     denseLeft.Data,
                     1,
-                    denseResult.Count,
+                    denseLeft.Count,
                     Data,
                     RowCount,
                     ColumnCount,
diff --git a/src/Numerics/LinearAlgebra/Double/Matrix.cs b/src/Numerics/LinearAlgebra/Double/Matrix.cs
index a79b2998..94ae5fa6 100644
--- a/src/Numerics/LinearAlgebra/Double/Matrix.cs
+++ b/src/Numerics/LinearAlgebra/Double/Matrix.cs
@@ -228,7 +228,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double
         {
             CommonParallel.For(
                 0,
-                RowCount,
+                ColumnCount,
                 j =>
                 {
                     var s = 0.0;
diff --git a/src/Numerics/LinearAlgebra/Single/Matrix.cs b/src/Numerics/LinearAlgebra/Single/Matrix.cs
index 83bde3f6..7b6a4dc7 100644
--- a/src/Numerics/LinearAlgebra/Single/Matrix.cs
+++ b/src/Numerics/LinearAlgebra/Single/Matrix.cs
@@ -218,7 +218,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single
         {
             CommonParallel.For(
                 0,
-                RowCount,
+                ColumnCount,
                 j =>
                 {
                     var s = 0.0f;