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permutation - implemented general antisymmetrizer

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Jiri Pittner
2024-01-17 22:53:59 +01:00
parent 32f2a1abd5
commit 8bc2179f3b
3 changed files with 63 additions and 15 deletions
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12
permutation.h
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@@ -76,7 +76,7 @@ public:
PERM_RANK_TYPE generate_all2(void (*callback)(const NRPerm<T>&)); //recursive method, also not lexicographic
PERM_RANK_TYPE generate_all_lex(void (*callback)(const NRPerm<T>&)); //generate in lex order using next()
PERM_RANK_TYPE generate_restricted(void (*callback)(const NRPerm<T>&), const NRVec_from1<T> &classes, int restriction_type=0);
PermutationAlgebra<T,T> list_restricted(const NRVec_from1<T> &classes, int restriction_type=0); //weight is set to parity (antisymmetrizer) by default
PermutationAlgebra<T,T> list_restricted(const NRVec_from1<T> &classes, int restriction_type=0, bool inverted=false); //weight is set to parity (antisymmetrizer) by default
PERM_RANK_TYPE rank() const; //counted from 0 to n!-1
NRVec_from1<T> inversions(const int type, PERM_RANK_TYPE *prank=NULL) const; //inversion tables
explicit NRPerm(const int type, const NRVec_from1<T> &inversions); //compute permutation from inversions
@@ -94,8 +94,8 @@ NRVec_from1<X> applypermutation(const NRPerm<T> &p, const NRVec_from1<X> &set, b
if(p.size()!=set.size()) laerror("size mismatch in applypermutation");
#endif
NRVec_from1<X> r(set.size());
if(inverse) for(int i=1; i<p.size(); ++i) r[p[i]] = set[i];
else for(int i=1; i<p.size(); ++i) r[i] = set[p[i]];
if(inverse) for(int i=1; i<=p.size(); ++i) r[p[i]] = set[i];
else for(int i=1; i<=p.size(); ++i) r[i] = set[p[i]];
return r;
}
@@ -190,8 +190,6 @@ public:
};
//TODO@@@ permutationalgebra for Kucharski style antisymmetrizers
extern PERM_RANK_TYPE factorial(const int n);
extern PERM_RANK_TYPE binom(int n, int k);
@@ -392,5 +390,9 @@ return r;
}
template<typename T>
PermutationAlgebra<T,T> general_antisymmetrizer(const NRVec<NRVec_from1<T> > &groups, int restriction_type=0, bool inverted=false);
}//namespace
#endif