backsub — solution of linear equations


\begin{rail} backsub : 'backsub' '(' List ',' Matrix ')' ; \end{rail}
The backsub function computes the solution to the set of linear equations described by:

AX = B

The list argument to backsub is the result from factor(A). The second argument to backsub is the matrix B, where each column of B is a seperate right hand side. backsub returns X, the solution of the linear equations. Each column of X corresponds to that column of B.
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