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Stream: theory: category theory

Topic: or-fibrations

view this post on Zulip Christian Williams (Jan 12 2023 at 01:42):

An orfibration is either a fibration or an opfibration. Dependent categories come in two opposite forms, yet they union (in TwoSidedFib) to form one double category OrFib, which is bifibered over Cat. Here is the pull and push of orfibrations.
orfib-pull.png orfib-push.png