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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Clément Maria
*
* Copyright (C) 2014 INRIA Sophia Antipolis-Méditerranée (France)
*
* 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 3 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/>.
*/
/** \brief Value type for a filtration function on a cell complex.
*
* A <EM>filtration</EM> of a cell complex (see FilteredComplex) is
* a function \f$f:\mathbf{K} \rightarrow \mathbb{R}\f$ satisfying \f$f(\tau)\leq
* f(\sigma)\f$ whenever \f$\tau \subseteq \sigma\f$. Ordering the simplices
* by increasing filtration values (breaking ties so as a simplex appears after
* its subsimplices of same filtration value) provides an indexing scheme
* (see IndexingTag).
*/
struct FiltrationValue {
/** \brief Operator < is a StrictWeakOrdering. */
bool operator<(FiltrationValue f1, FiltrationValue f2);
};
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