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https://github.com/vale981/arb
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34 lines
902 B
C
34 lines
902 B
C
/*
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Copyright (C) 2016 Pascal Molin
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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 it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "dirichlet.h"
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void
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dirichlet_char_first_primitive(dirichlet_char_t x, const dirichlet_group_t G)
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{
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ulong k;
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if (G->q % 4 == 2)
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{
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flint_printf("Exception (dirichlet_char_first_primitive). No primitive element mod %wu.\n",G->q);
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abort();
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}
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x->n = 1;
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for (k = 0; k < G->num ; k++)
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{
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if (k == 0 && G->neven == 2)
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x->log[k] = 0;
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else
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{
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x->n = nmod_mul(x->n, G->generators[k], G->mod);
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x->log[k] = 1;
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}
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}
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}
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