Keyword : Sylvester

F08QHF	Solve real Sylvester matrix equation $A X + X B = C$ , $A$ and $B$ are upper quasi-triangular or transposes
F08QVF	Solve complex Sylvester matrix equation $A X + X B = C$ , $A$ and $B$ are upper triangular or conjugate-transposes
F08YHF	Solves the real-valued generalized Sylvester equation
F08YVF	Solves the complex generalized Sylvester equation