| | Some definitions of interest. |
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| int_seg | Def {i..j } == {k: | i k < j } |
| | | Thm* m,n: . {m..n } Type |
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| one_one_corr_2 | Def A ~ B == f:(A B), g:(B A). InvFuns(A;B;f;g) |
| | | Thm* A,B:Type. (A ~ B) Prop |
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| singleton | Def {a:T} == {x:T| x = a T } |
| | | Thm* T:Type, a:T. {a:T} Type |