intersect.cpp
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/* Frobby: Software for monomial ideal computations.
Copyright (C) 2007 Bjarke Hammersholt Roune (www.broune.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/.
*/
#include "stdinc.h"
#include "intersect.h"
#include "Ideal.h"
#include "Term.h"
void intersect(Ideal* output, const Ideal* a, const Ideal* b) {
ASSERT(a->getVarCount() == b->getVarCount());
output->clear();
Term term(a->getVarCount());
for (Ideal::const_iterator aIt = a->begin(); aIt != a->end(); ++aIt) {
for (Ideal::const_iterator bIt = b->begin(); bIt != b->end();++bIt) {
term.lcm(*aIt, *bIt);
output->insert(term);
}
}
output->minimize();
}
Ideal.h
Term.h
Ideal
Represents a monomial ideal with int exponents.
Definition Ideal.h:27
Ideal::minimize
void minimize()
Definition Ideal.cpp:501
Ideal::const_iterator
Cont::const_iterator const_iterator
Definition Ideal.h:43
Ideal::clear
void clear()
Definition Ideal.cpp:641
Ideal::insert
void insert(const Exponent *term)
Definition Ideal.cpp:455
Ideal::end
const_iterator end() const
Definition Ideal.h:49
Ideal::begin
const_iterator begin() const
Definition Ideal.h:48
Ideal::getVarCount
size_t getVarCount() const
Definition Ideal.h:56
Term
Term represents a product of variables which does not include a coefficient.
Definition Term.h:49
Term::lcm
static void lcm(Exponent *res, const Exponent *a, const Exponent *b, size_t varCount)
Sets res equal to the least commom multiple of a and b.
Definition Term.h:221
intersect
void intersect(Ideal *output, const Ideal *a, const Ideal *b)
Definition intersect.cpp:23
intersect.h
stdinc.h
This header file includes common definitions and is included as the first line of code in every imple...
ASSERT
#define ASSERT(X)
Definition stdinc.h:86