# 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 |