5.1.158 trace

Syntax:

trace ( intmat_expression )
trace ( matrix_expression )

Type:

int, if the argument is an intmat, resp.
poly, if the argument is a matrix

Purpose:

returns the trace of an intmat, resp. matrix.

Example:

intmat m[2][2]=1,2,3,4; print(m); ==> 1 2 ==> 3 4 trace(m); ==> 5