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Approx tests and lanczos improvement

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This commit is contained in:
paboyle
2017-10-13 11:30:50 +01:00
parent 9fe6ac71ea
commit cb9ff20249
9 changed files with 823 additions and 712 deletions
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36
tests/debug/Test_cheby.cc
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@ -37,8 +37,15 @@ RealD InverseApproximation(RealD x){
RealD SqrtApproximation(RealD x){
return std::sqrt(x);
}
RealD Approximation32(RealD x){
return std::pow(x,-1.0/32.0);
}
RealD Approximation2(RealD x){
return std::pow(x,-1.0/2.0);
}
RealD StepFunction(RealD x){
if ( x<0.1 ) return 1.0;
if ( x<10.0 ) return 1.0;
else return 0.0;
}
@ -56,7 +63,6 @@ int main (int argc, char ** argv)
Chebyshev<LatticeFermion> ChebyInv(lo,hi,2000,InverseApproximation);
{
std::ofstream of("chebyinv");
ChebyInv.csv(of);
@ -78,7 +84,6 @@ int main (int argc, char ** argv)
ChebyStep.JacksonSmooth();
{
std::ofstream of("chebystepjack");
ChebyStep.csv(of);
@ -100,5 +105,30 @@ int main (int argc, char ** argv)
ChebyNE.csv(of);
}
lo=0.0;
hi=4.0;
Chebyshev<LatticeFermion> Cheby32(lo,hi,2000,Approximation32);
{
std::ofstream of("cheby32");
Cheby32.csv(of);
}
Cheby32.JacksonSmooth();
{
std::ofstream of("cheby32jack");
Cheby32.csv(of);
}
Chebyshev<LatticeFermion> ChebySqrt(lo,hi,2000,Approximation2);
{
std::ofstream of("chebysqrt");
ChebySqrt.csv(of);
}
ChebySqrt.JacksonSmooth();
{
std::ofstream of("chebysqrtjack");
ChebySqrt.csv(of);
}
Grid_finalize();
}