| Some definitions of interest. |
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eqfun_p | Def IsEqFun(T;eq) == x,y:T. (x eq y)  x = y |
| | Thm* T:Type, eq:(T T  ). IsEqFun(T;eq) Prop |
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assert | Def b == if b True else False fi |
| | Thm* b: . b Prop |
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eq_int | Def i= j == if i=j true ; false fi |
| | Thm* i,j: . (i= j)  |
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iff | Def P  Q == (P  Q) & (P  Q) |
| | Thm* A,B:Prop. (A  B) Prop |
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int_seg | Def {i..j } == {k: | i k < j } |
| | Thm* m,n: . {m..n } Type |
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nat | Def == {i: | 0 i } |
| | Thm* Type |
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so_lambda2 | Def ( 1,2. b(1;2))(1,2) == b(1;2) |