Matrix methods for solving systems of linear equations

Methods for solving systems of linear equations and calculating the inverse matrix.

Function	Action
Solve	Solve a linear matrix equation, or system of linear algebraic equations
LstSq	Return the least-squares solution of linear algebraic equations (for non-square or degenerate matrices)
Inv	Compute the (multiplicative) inverse of a square non-degenerate matrix by the Jordan-Gauss method
PInv	Compute the pseudo-inverse of a matrix by the Moore-Penrose method