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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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/*

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 * Normaliz

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 * Copyright (C) 2007-2014  Winfried Bruns, Bogdan Ichim, Christof Soeger

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 * This program 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 3 of the License, or

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 * (at your option) any later version.

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 *

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 * This program 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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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

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 *

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 * As an exception, when this program is distributed through (i) the App Store

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 * by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or (iii) Google Play

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 * by Google Inc., then that store may impose any digital rights management,

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 * device limits and/or redistribution restrictions that are required by its

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 * terms of service.

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 */

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#ifdef NMZ_MIC_OFFLOAD

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#pragma offload_attribute (push, target(mic))

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#endif

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#include "libQnormaliz/Qcone_helper.h"

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#include <vector>

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namespace libQnormaliz {

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using std::vector;

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//---------------------------------------------------------------------------

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// determines the maximal subsets in a vector of subsets given by their indicator vectors

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// result returned in is_max_subset -- must be initialized outside

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// only set to false in this routine

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// if a set occurs more than once, only the last instance is recognized as maximal

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void maximal_subsets(const vector<vector<bool> >& ind, vector<bool>& is_max_subset) {

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    if(ind.size()==0)

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        return;

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    size_t nr_sets=ind.size();

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    size_t card=ind[0].size();

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    vector<key_t> elem(card);

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    for (size_t i = 0; i <nr_sets; i++) {

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        if(!is_max_subset[i])  // already known to be non-maximal

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            continue;

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        size_t k=0; // counts the number of elements in set with index i

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        for (size_t j = 0; j <card; j++) {

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            if (ind[i][j]) {

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                elem[k]=j;

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                k++;

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            }

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        }

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        for (size_t j = 0; j <nr_sets; j++) {

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            if (i==j || !is_max_subset[j] ) // don't compare with itself or something known not to be maximal

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                continue;

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            size_t t;

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            for (t = 0; t<k; t++) {

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                if (!ind[j][elem[t]])

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                    break; // not a superset

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            }

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            if (t==k) { // found a superset

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                is_max_subset[i]=false;

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                break; // the loop over j

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            }

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        }

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    }

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}

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//---------------------------------------------------------------------------

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#ifdef NMZ_MIC_OFFLOAD

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#pragma offload_attribute (pop)

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#endif

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} //end namespace libQnormaliz

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