Singular Manual: trace

  | ### 5.1.156 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
See intmat; matrix.

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