Frobby 0.9.5
FrobeniusAction.cpp
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1/* Frobby: Software for monomial ideal computations.
2 Copyright (C) 2007 Bjarke Hammersholt Roune (www.broune.com)
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see http://www.gnu.org/licenses/.
16*/
17#include "stdinc.h"
18#include "FrobeniusAction.h"
19
20#include "BigIdeal.h"
21#include "IOFacade.h"
22#include "SliceFacade.h"
23#include "SliceParams.h"
24#include "BigTermRecorder.h"
25#include "Scanner.h"
26#include "display.h"
27
29 Action
30(staticGetName(),
31 "Compute Frobenius number using a Grobner basis algorithm.",
32 "Compute the Frobenius number of the passed-in Frobenius instance. This "
33 "instance\n"
34 "must be preceded in the input by a deg-rev-lex lattice ideal Grobner basis "
35 "as\n"
36 "produced by the program 4ti2.\n\n"
37 "The algorithm for this uses irreducible decomposition to compute the "
38 "Frobenius\n"
39 "number, which is why this action accepts parameters related to that. See "
40 "the\n"
41 "paper \"Solving Thousand Digit Frobenius Problems Using Grobner Bases\"\n"
42 "at www.broune.com for more details.",
43 false),
44
45 _sliceParams(true, false),
46 _displaySolution
47("vector",
48 "Display the vector that achieves the optimal value.",
49 false) {
50 _sliceParams.setSplit("frob");
51}
52
59
62 ("The action frobgrob is DEPRECATED, and will be removed in a future "
63 "release of Frobby. Use the action optimize with options "
64 "-chopFirstAndSubtract and -maxStandard instead to get the same effect.");
65
67 validateSplit(params, true, true);
68
69 vector<mpz_class> instance;
70 BigIdeal ideal;
71
73 Scanner in("", stdin);
74 ioFacade.readFrobeniusInstanceWithGrobnerBasis(in, ideal, instance);
75 in.expectEOF();
76
77 vector<mpz_class> shiftedDegrees(instance.begin() + 1, instance.end());
78 vector<mpz_class> bigVector;
79
81
84 facade.solveStandardProgram(shiftedDegrees, dummy, false);
85
86 BigIdeal maxSolution = *(recorder.releaseIdeal());
87
88 ASSERT(maxSolution.getGeneratorCount() == 1);
90
92 for (size_t i = 1; i < instance.size(); ++i)
94
95 if (_displaySolution) {
96 fputs("(-1", stdout);
97 for (size_t i = 0; i < bigVector.size(); ++i)
99 fputs(")\n", stdout);
100 }
101
102 gmp_fprintf(stdout, "%Zd\n", frobeniusNumber.get_mpz_t());
103}
104
106 return "frobgrob";
107}
108
110 return false;
111}
void nameFactoryRegister(NameFactory< AbstractProduct > &factory)
Registers the string returned by ConcreteProduct::getStaticName() to a function that default-construc...
void validateSplit(const SliceParams &params, bool allowLabel, bool allowDegree)
CliParams _params
Definition Action.h:59
BoolParameter _printActions
Definition Action.h:68
virtual void obtainParameters(vector< Parameter * > &parameters)
Definition Action.cpp:133
BigTermRecorder records all the terms it consumes into an ideal.
virtual bool displayAction() const
Returns whether this action should be shown to the user by the help action.
BoolParameter _displaySolution
virtual void obtainParameters(vector< Parameter * > &parameters)
SliceParameters _sliceParams
static const char * staticGetName()
virtual void perform()
A facade for input and output of mathematical objects.
Definition IOFacade.h:39
void obtainParameters(vector< Parameter * > &parameters)
This class offers an input interface which is more convenient and for some purposes more efficient th...
Definition Scanner.h:50
A facade for operations on monomial ideals using the Slice Algorithm.
Definition SliceFacade.h:44
void setSplit(const string &split)
Set the value of the option for choosing the split selection strategy.
void displayNote(const string &msg)
Display msg to standard error in a way that indicates that this is something that the user should tak...
Definition display.cpp:135
This file contains functions for printing strings to standard error.
#define ASSERT(X)
Definition stdinc.h:86