I have devoleped code to derive a simple matrix expression: [K]*[D]=[R] wher D is an unknown vector. I am looking for code to do two things: 1. Invert [K] to get the expression [D]=inv([K])*[R] 2. Solve the equation in 1 It looks like the UBLAS toolkit provides a function _t_sv to solve the equation, but I do not see anything to help me invert the matrix. Is there code available to help me invert a matrix? While I am at it, I may as well ask if _t_sv is the best function to use to solve the system. Thanks, Jeff