| Some definitions of interest. |
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delete_fenum_value | Def Replace value k by f(m) in f == Replace values x s.t. x=k by f(m) in f |
| | Thm* Inj({k:| P(k) }; {k:| Q(k) }; f)
Thm*
Thm* (m:{u:| P(u) }, k:{v:| Q(v) }.
Thm* ((Replace value k by f(m) in f)
Thm* ( {u:| P(u) & u = m }{v:| Q(v) & v = k }) |
| | Thm* Inj((m+1); (k+1); f) (Replace value k by f(m) in f) mk |
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inject | Def Inj(A; B; f) == a1,a2:A. f(a1) = f(a2) B a1 = a2 |
| | Thm* A,B:Type, f:(AB). Inj(A; B; f) Prop |
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not | Def A == A False |
| | Thm* A:Prop. (A) Prop |
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surject | Def Surj(A; B; f) == b:B. a:A. f(a) = b |
| | Thm* A,B:Type, f:(AB). Surj(A; B; f) Prop |