/// <summary>
/// Only for this processor:
/// </summary>
/// Number of non-zero elements
/// in the upper triangle.
/// <returns></returns>
static public int GetLocalNoOfUpperTriangularNonZeros(this IMutableMatrixEx M)
{
int odnz = 0;
var rowPart = M.RowPartitioning;
int i0 = (int)rowPart.i0;
for (int i = (int)(rowPart.i0 + rowPart.LocalLength - 1); i >= i0; i--)
{
odnz += M.GetNoOfUpperTriangualNonZerosPerRow(i);
}
return(odnz);
}
