[Merged by Bors] - refactor(order/hom/complete_lattice): Fix the definition of frame_hom
#12855
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I misread "preserves finite meet" as "preserves binary meet", meaning that currently a
frame_hom
does not have to preserve⊤
(subtly, preserving arbitrary join does not imply that either). This fixes my mistake.I had to change the extension path for
complete_lattice_hom
because two instances were not defeq (but they were defeq afterext
). See Zulip