| Some definitions of interest. |
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iff | Def P Q == (P Q) & (P Q) |
| | Thm* A,B:Prop. (A B) Prop |
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int_iseg | Def {i...j} == {k:| ik & kj } |
| | Thm* i,j:. {i...j} Type |
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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:(AB), g:(BA). InvFuns(A;B;f;g) |
| | Thm* A,B:Type. (A ~ B) Prop |
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inv_funs_2 | Def InvFuns(A;B;f;g) == (x:A. g(f(x)) = x) & (y:B. f(g(y)) = y) |
| | Thm* f:(AB), g:(BA). InvFuns(A;B;f;g) Prop |
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invisible_wrapper | Def x == x |
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lelt | Def i j < k == ij & j<k |
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nat | Def == {i:| 0i } |
| | Thm* Type |
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le | Def AB == B<A |
| | Thm* i,j:. (ij) Prop |