Inputs must be single or double. Inputs must be 2-D. Inputs must be full. First and second inputs must be square. Inputs must have compatible size. First and second inputs must not contain NaN or Inf. Inputs must be single, double, or ''I'' to specify an identity matrix. Inputs must be double. Substituting ''I'' for a matrix is only supported in the combinations SYLVESTER_TRI(A, B, C, ''I'', ''I'') and SYLVESTER_TRI(A, ''I'', C, ''I'', F). Option must be ''transp'' or ''notransp''.