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### D.17.2 `umf` output

If no exception occurs, the solution x to the matrix equation M x = b noted previously will be returned if one exists.

The solution is represented as either a list of real numbers as in `math`, or a list of complex numbers as in `complex`. Real numbers are returned by the `di_`* functions, and complex numbers are returned by the `zi_`* functions.

If no solution exists due to a singular matrix, an empty list is returned. The lack of a solution isn’t treated as an exceptional condition.

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