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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2011, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* 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, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
/* end stub */
#include "algebra/nabeliangroup.h"
#include "manifold/nhandlebody.h"
namespace regina {
NAbelianGroup* NHandlebody::getHomologyH1() const {
NAbelianGroup* ans = new NAbelianGroup();
if (nHandles)
ans->addRank(nHandles);
return ans;
}
std::ostream& NHandlebody::writeName(std::ostream& out) const {
if (nHandles == 0)
out << "B3";
else if (nHandles == 1) {
if (orientable)
out << "B2 x S1";
else
out << "B2 x~ S1";
} else {
if (orientable)
out << "Handle-Or(" << nHandles << ')';
else
out << "Handle-Nor(" << nHandles << ')';
}
return out;
}
std::ostream& NHandlebody::writeTeXName(std::ostream& out) const {
if (nHandles == 0)
out << "B^3";
else if (nHandles == 1) {
if (orientable)
out << "B^2 \\times S^1";
else
out << "B^2 \\twisted S^1";
} else {
if (orientable)
out << "\\mathit{Handle-Or}(" << nHandles << ')';
else
out << "\\mathit{Handle-Nor}(" << nHandles << ')';
}
return out;
}
} // namespace regina
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