trijoin_id_sym is natural; export more from HSpace/Core #1786
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Swap the names of
triangle_vandtriangle_v', and same for the_hversions. This is the first commit, which can be deselected to get a cleaner view of the next two commits.Add
trijoin_id_symas a definition forfunctor_join idmap (join_sym _ _), which turns out to play a central role as it is the permutation (2,3), the other generator of S_3. Prove that it is natural.Also export a few more things from canonical_names in HSpace/Core, as some other work I'm doing depends on those.