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Adding TrueHarmonicBlockKrylovSchur

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This commit is contained in:
Chulwoo Jung
2026-07-09 20:38:08 -04:00
parent d2189d59e0
commit c1284e080a
5 changed files with 435 additions and 51 deletions
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examples/Example_krylov_schur.cc
+15 -6
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@@ -334,13 +334,13 @@ int main (int argc, char ** argv)
// Run KrylovSchur and Arnoldi on a Hermitian matrix
RealD shift=LanParams.shift;
#if 0
#if 1
std::cout << GridLogMessage << "Running Krylov Schur" << std::endl;
KrylovSchur KrySchur (Dwilson, UGrid, resid,EvalImNormSmall);
// KrySchur(src[0], maxIter, Nm, Nk, Nstop);
KrySchur.doEvalCheck=true;
// KrySchur(src[0], maxIter, Nm, Nk, Nstop,&shift);
KrySchur(src[0], maxIter, Nm, Nk, Nstop);
KrySchur(src[0], maxIter, Nm, Nk, Nstop,&shift);
// KrySchur(src[0], maxIter, Nm, Nk, Nstop);
std::cout << GridLogMessage << "KrylovSchur evec.size= " << KrySchur.evecs.size()<< std::endl;
#else
std::cout << GridLogMessage << "Running BlockKrylovSchur" << std::endl;
@@ -349,10 +349,19 @@ int main (int argc, char ** argv)
bool if_verify=false;
if(LanParams.verify) if_verify=true;
// BlockKrylovSchur KrySchur (Dwilson, UGrid, resid,EvalImNormSmall);
HarmonicBlockKrylovSchur KrySchur (Dwilson, UGrid, resid,shift,EvalNormSmall);
bool useTrueHarmonic = GridCmdOptionExists(argv, argv+argc, std::string("--true-harmonic"));
HarmonicBlockKrylovSchur<FermionField> KrySchurShift (Dwilson, UGrid, resid,shift,EvalImNormSmall);
TrueHarmonicBlockKrylovSchur<FermionField> KrySchurTrue (Dwilson, UGrid, resid,shift,EvalImNormSmall);
HarmonicBlockKrylovSchur<FermionField>& KrySchur = useTrueHarmonic
? static_cast<HarmonicBlockKrylovSchur<FermionField>&>(KrySchurTrue)
: KrySchurShift;
std::cout << GridLogMessage
<< (useTrueHarmonic ? "Using TrueHarmonicBlockKrylovSchur (harmonic Ritz)"
: "Using HarmonicBlockKrylovSchur (shift-sorted Ritz)")
<< std::endl;
KrySchur.doEvalCheck=true;
KrySchur.useParityFlip=true; std::cout << GridLogMessage << "useParityFlip= " <<KrySchur.useParityFlip<< std::endl;
KrySchur.useGamma5=true; std::cout << GridLogMessage << "useGamma5= " <<KrySchur.useGamma5<< std::endl;
// KrySchur.useParityFlip=true; std::cout << GridLogMessage << "useParityFlip= " <<KrySchur.useParityFlip<< std::endl;
// KrySchur.useGamma5=true; std::cout << GridLogMessage << "useGamma5= " <<KrySchur.useGamma5<< std::endl;
KrySchur.gamma5Func = [](const FermionField& v, FermionField& out) {
Gamma g5(Gamma::Algebra::Gamma5);
out = g5 * v;