#### Topic: How fast matrix multiplication accelerates calculation of Slough?

There is a so-called "school" method of the decision of linear equation systems - at first lead system to a triangular type, and then we calculate values of variables, we go reversely and is substituted already calculated to receive the remaining. About it is called as a method of the Gauss. Well or the same with selection of a principal/basic element. To me it is not clear - at what here multiplication of matrixes? How it is necessary to use fast matrix multiplication (which calculation of Slough can accelerate)?