Theorem sbcie 1958

Description: Conversion of implicit substitution to explicit class substitution.

Hypotheses

Ref	Expression
sbcie.1	|- A e. V
sbcie.2	|- (x = A -> (ph <-> ps))

Assertion

Ref	Expression
sbcie	|- ([A / x]ph <-> ps)

Distinct variable groups:   x,A   ps,x

Proof of Theorem sbcie

Step	Hyp	Ref	Expression
1		sbcie.1	. 2 |- A e. V
2		sbcie.2	. . 3 |- (x = A -> (ph <-> ps))
3	2	sbcieg 1957	. 2 |- (A e. V -> ([A / x]ph <-> ps))
4	1, 3	ax-mp 7	1 |- ([A / x]ph <-> ps)

Syntax hints:   -> wi 3   <-> wb 146   = wceq 954   e. wcel 956  [wsbc 1168  Vcvv 1807

This theorem is referenced by:  intab 2555  tfinds2 3160

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 960  ax-gen 961  ax-8 962  ax-10 964  ax-12 966  ax-17 969  ax-4 971  ax-5o 973  ax-6o 976  ax-9o 1121  ax-10o 1138  ax-16 1208  ax-11o 1216  ax-ext 1457

This theorem depends on definitions:  df-bi 147  df-an 225  df-3an 776  df-ex 979  df-sb 1170  df-clab 1462  df-cleq 1467  df-clel 1470  df-v 1808  df-sbc 1938

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