Theorem sbcth2 3042

Description: A substitution into a theorem. (Contributed by NM, 1-Mar-2008.) (Proof shortened by Mario Carneiro, 13-Oct-2016.)

Hypothesis

Ref	Expression
sbcth2.1	|- ( x e. B -> ph )

Assertion

Ref	Expression
sbcth2	|- ( A e. B -> [. A / x ]. ph )

Distinct variable group:   x, B

Allowed substitution hints:   ph( x)   A( x)

Proof of Theorem sbcth2

Step	Hyp	Ref	Expression
1		sbcth2.1	. . 3 |- ( x e. B -> ph )
2	1	rgen 2523	. 2 |- A. x e. B ph
3		rspsbc 3037	. 2 |- ( A e. B -> ( A. x e. B ph -> [. A / x ]. ph ) )
4	2, 3	mpi 15	1 |- ( A e. B -> [. A / x ]. ph )

Syntax hints:   -> wi 4   e. wcel 2141   A.wral 2448   [.wsbc 2955

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-v 2732  df-sbc 2956

This theorem is referenced by: (None)