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kronecker function and overload for matsubara_freq

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Used in solver codes.
This commit is contained in:
Olivier Parcollet 2014-03-02 17:10:57 +01:00
parent 9911b18363
commit 1e220d24c7
2 changed files with 36 additions and 0 deletions
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6
triqs/gfs/domains/matsubara.hpp
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@ -21,6 +21,7 @@
#pragma once
#include "../tools.hpp"
#include <triqs/utility/arithmetic_ops_by_cast.hpp>
#include <triqs/utility/kronecker.hpp>
namespace triqs {
namespace gfs {
@ -103,6 +104,11 @@ namespace gfs {
using matsubara_freq_domain = matsubara_domain<true>;
using matsubara_time_domain = matsubara_domain<false>;
// ----- kronecker function : overload for matsubara_freq
inline bool kronecker(matsubara_freq const & freq) { return freq.n == 0; }
inline bool kronecker(matsubara_freq const & f1, matsubara_freq const &f2) { return f1.n == f2.n; }
}
}

30
triqs/utility/kronecker.hpp Normal file
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@ -0,0 +1,30 @@
/*******************************************************************************
*
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
*
* Copyright (C) 2014 by O. Parcollet
*
* TRIQS 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.
*
* TRIQS 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
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
#pragma once
#include <triqs/clef.hpp>
inline bool kronecker(int i, int j) { return i == j; }
namespace triqs {
namespace clef {
TRIQS_CLEF_MAKE_FNT_LAZY(kronecker);
}
}