math_Matrix::Multiply() seems to be wrong

Hi all,

it seems that method math_Matrix::Multiply(const math_Matrix& Right) is wrong. In the following code, when I = 0, J2 = 0, the code "Array(I, J2) = Som;" sets Array(0, 0) to Som, but then Array(0,0) is reused to compute the final elements in position Array(0,1), Array(0,2), ... Array(0,Right.UpperColIndex), that is it is reused to compute the other elements of the first row of Array. A similar issue appears to me to be in the computation of the remaining rows of Array(). Am I wrong?

void math_Matrix::Multiply(const math_Matrix& Right)
{
Standard_DimensionError_Raise_if(
ColNumber() != Right.RowNumber(),
"math_Matrix::Multiply() - input matrix has incompatible dimensions");

Standard_Real Som;
for (Standard_Integer I = LowerRowIndex; I <= UpperRowIndex; I++)
{
for (Standard_Integer J2 = Right.LowerColIndex; J2 <= Right.UpperColIndex; J2++)
{
Som = 0.0;
Standard_Integer I2 = Right.LowerRowIndex;
for (Standard_Integer J = LowerColIndex; J <= UpperColIndex; J++)
{
Som = Som + Array(I, J) * Right.Array(I2, J2);
I2++;
}
Array(I, J2) = Som;
}
}
}