297d50378d
define embedding, (split) surjection, retraction, existential quantifier, 'or' connective also add a whole bunch of theorems about these definitions still has two sorry's which can be solved after #564 is closed |
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circle.hlean | ||
coeq.hlean | ||
colimit.hlean | ||
cylinder.hlean | ||
hit.md | ||
pushout.hlean | ||
quotient.hlean | ||
sphere.hlean | ||
suspension.hlean | ||
trunc.hlean | ||
type_quotient.hlean |