Recognizes linear form in vector expression.

::

 linear_coeff(DM ex, DM arg, bool check) -> (DM OUTPUT1, DM OUTPUT2)
 linear_coeff(SX ex, SX arg, bool check) -> (SX OUTPUT1, SX OUTPUT2)
 linear_coeff(MX ex, MX arg, bool check) -> (MX OUTPUT1, MX OUTPUT2)

A x + b

Parameters:

check[in]: When true (default)m, A is checked to be independent of x. Provided to deal with false positive dependency checks.

Extra doc: https://github.com/casadi/casadi/wiki/L_1d3

Doc source: https://github.com/casadi/casadi/blob/develop/casadi/core/generic_matrix.hpp#L933

Implementation: https://github.com/casadi/casadi/blob/develop/casadi/core/generic_matrix.hpp#L933-L936

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