me/toddcox-faster
1
0
Fork 0
forked from mirror/toddcox-faster
Code Pull Requests Activity

add subgroup

Browse Source
This commit is contained in:
David Allemang
2020-01-07 23:06:48 -05:00
parent dc1ced7dcc
commit 462ebf7c25
4 changed files with 38 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
src/core.cpp
View File

@@ -4,8 +4,8 @@
#include <sstream>
namespace tc {
Action::Action(int coset, int gen, int target)
: coset(coset), gen(gen), target(target) {
Action::Action(int from_idx, int gen)
: from_idx(from_idx), gen(gen) {
}
Cosets::Cosets(int ngens)
@@ -21,8 +21,8 @@ namespace tc {
data[coset * ngens + gen] = target;
data[target * ngens + gen] = coset;
if (path[target].coset == -1) {
path[target] = Action(coset, gen, target);
if (path[target].from_idx == -1) {
path[target] = Action(coset, gen);
}
}
@@ -32,8 +32,8 @@ namespace tc {
data[idx] = target;
data[target * ngens + gen] = coset;
if (path[target].coset == -1) {
path[target] = Action(coset, gen, target);
if (path[target].from_idx == -1) {
path[target] = Action(coset, gen);
}
}
@@ -89,6 +89,10 @@ namespace tc {
return res;
}
SubGroup Group::subgroup(const std::vector<int> &gens) const {
return SubGroup(*this, gens);
}
Group Group::product(const Group &other) const {
std::stringstream ss;
ss << name << "*" << other.name;
@@ -115,4 +119,15 @@ namespace tc {
return g;
}
}
SubGroup::SubGroup(const Group &parent, const std::vector<int> &gen_map)
: Group(gen_map.size()), parent(parent), gen_map(gen_map) {
for (size_t i = 0; i < gen_map.size(); ++i) {
for (size_t j = 0; j < gen_map.size(); ++j) {
int mult = parent.get(gen_map[i], gen_map[j]);
set(Rel(i, j, mult));
}
}
}
}