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/*
Copyright (C) 2020 Fredrik Johansson
This file is part of Calcium.
Calcium is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "ca_mat.h"
void
ca_mat_trace(ca_t trace, const ca_mat_t mat, ca_ctx_t ctx)
{
slong i;
if (!ca_mat_is_square(mat))
{
flint_printf("ca_mat_trace: a square matrix is required!\n");
flint_abort();
}
if (ca_mat_is_empty(mat))
{
ca_zero(trace, ctx);
return;
}
ca_set(trace, ca_mat_entry(mat, 0, 0), ctx);
for (i = 1; i < ca_mat_nrows(mat); i++)
{
ca_add(trace, trace, ca_mat_entry(mat, i, i), ctx);
}
}
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