Triangular factor
Triangular factors are [Triangular Matrix|Triangular Matrices] the results of LU Decomposition or QR Decomposition.
In the QR Decomposition, the resulting R matrix is Triangular factor. In the LU Decomposition, the resulting L and U matrices are Triangular factors.
"" There are many cases when it is important to have information on the extremal singular values of a square matrix A. Sometimes, it is too expensive to calculate the singular values exactly and an approximation of these quantities suffices. "" They can be calculated from the Triangular Factor. from http://www-sccm.stanford.edu/seminar-w2003/Slot02.htm mentions the usage of Triangular Factors