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Theorem cla4v 142
Description: If A(x) is true for all x:α, then it is true for C = A(B).
Hypotheses
Ref Expression
cla4v.1 A:∗
cla4v.2 B:α
cla4v.3 [x:α = B]⊧[A = C]
Assertion
Ref Expression
cla4v (λx:α A)⊧C
Distinct variable groups:   x,B   x,C   α,x

Proof of Theorem cla4v
StepHypRef Expression
1 cla4v.1 . . . 4 A:∗
21wl 59 . . 3 λx:α A:(α → ∗)
3 cla4v.2 . . 3 B:α
42, 3ax4g 139 . 2 (λx:α A)⊧(λx:α AB)
54ax-cb1 29 . . 3 (λx:α A):∗
6 cla4v.3 . . . 4 [x:α = B]⊧[A = C]
71, 3, 6cl 106 . . 3 ⊤⊧[(λx:α AB) = C]
85, 7a1i 28 . 2 (λx:α A)⊧[(λx:α AB) = C]
94, 8mpbi 72 1 (λx:α A)⊧C
Colors of variables: type var term
Syntax hints:  tv 1  hb 3  kc 5  λkl 6   = ke 7  [kbr 9  wffMMJ2 11  wffMMJ2t 12  tal 112
This theorem was proved from axioms:  ax-syl 15  ax-jca 17  ax-simpl 20  ax-simpr 21  ax-id 24  ax-trud 26  ax-cb1 29  ax-cb2 30  ax-refl 39  ax-eqmp 42  ax-ded 43  ax-ceq 46  ax-beta 60  ax-distrc 61  ax-leq 62  ax-hbl1 93  ax-17 95  ax-inst 103
This theorem depends on definitions:  df-ov 65  df-al 116
This theorem is referenced by:  pm2.21  143  ecase  153  exlimdv2  156  ax4e  158  eta  166  exlimd  171  ac  184  ax10  200
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