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small additions to permutations

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Jiri Pittner
2024-01-24 13:41:39 +01:00
parent 13c23fb85d
commit 1ee984eda2
2 changed files with 42 additions and 5 deletions
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43
permutation.cc
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@@ -135,11 +135,27 @@ if(n!=q.size()) laerror("product of incompatible permutations");
NRPerm<T> r(n);
for(T i=1; i<=n; ++i) r[i] = (*this)[q[i]];
return r;
}
template <typename T>
NRPerm<T> NRPerm<T>::conjugate_by(const NRPerm<T> &q) const
NRPerm<T> NRPerm<T>::multiply(const NRPerm<T> &q, bool inverse) const
{
#ifdef DEBUG
if(!this->is_valid() || !q.is_valid()) laerror("multiplication of invalid permutation");
#endif
T n=this->size();
if(n!=q.size()) laerror("product of incompatible permutations");
NRPerm<T> r(n);
if(inverse) for(T i=1; i<=n; ++i) r[q[i]] = (*this)[i];
else for(T i=1; i<=n; ++i) r[i] = (*this)[q[i]];
return r;
}
template <typename T>
NRPerm<T> NRPerm<T>::conjugate_by(const NRPerm<T> &q, bool inverse) const
{
#ifdef DEBUG
if(!this->is_valid() || !q.is_valid()) laerror("multiplication of invalid permutation");
@@ -149,11 +165,30 @@ T n=this->size();
if(n!=q.size()) laerror("product of incompatible permutations");
NRPerm<T> qi=q.inverse();
NRPerm<T> r(n);
for(T i=1; i<=n; ++i) r[i] = qi[(*this)[q[i]]];
if(inverse) for(T i=1; i<=n; ++i) r[i] = q[(*this)[qi[i]]];
else for(T i=1; i<=n; ++i) r[i] = qi[(*this)[q[i]]];
return r;
}
template <typename T>
NRPerm<T> NRPerm<T>::commutator(const NRPerm<T> &q, bool inverse) const
{
#ifdef DEBUG
if(!this->is_valid() || !q.is_valid()) laerror("multiplication of invalid permutation");
#endif
T n=this->size();
if(n!=q.size()) laerror("product of incompatible permutations");
NRPerm<T> qi=q.inverse();
NRPerm<T> pi=this->inverse();
NRPerm<T> r(n);
if(inverse) for(T i=1; i<=n; ++i) r[i] = qi[pi[q[(*this)[i]]]];
else for(T i=1; i<=n; ++i) r[i] = pi[qi[(*this)[q[i]]]];
return r;
}
template <typename T>
CyclePerm<T> CyclePerm<T>::conjugate_by(const CyclePerm<T> &q) const
{