mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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ARB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ARB; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2016 Arb authors
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******************************************************************************/
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#include "acb_mat.h"
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void
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acb_mat_bound_frobenius_norm(mag_t b, const acb_mat_t A)
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{
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slong i, j, r, c;
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mag_t t;
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r = acb_mat_nrows(A);
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c = acb_mat_ncols(A);
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mag_zero(b);
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if (r == 0 || c == 0)
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return;
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mag_init(t);
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for (i = 0; i < r; i++)
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{
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for (j = 0; j < c; j++)
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{
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acb_srcptr z = acb_mat_entry(A, i, j);
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arb_get_mag(t, acb_realref(z));
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mag_addmul(b, t, t);
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arb_get_mag(t, acb_imagref(z));
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mag_addmul(b, t, t);
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}
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}
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mag_sqrt(b, b);
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mag_clear(t);
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}
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