Theorem csbeq2i 3072

Description: Formula-building inference for class substitution. (Contributed by NM, 10-Nov-2005.) (Revised by Mario Carneiro, 1-Sep-2015.)

Hypothesis

Ref	Expression
csbeq2i.1	|- B = C

Assertion

Ref	Expression
csbeq2i	|- [_ A / x ]_ B = [_ A / x ]_ C

Proof of Theorem csbeq2i

Step	Hyp	Ref	Expression
1		csbeq2i.1	. . . 4 |- B = C
2	1	a1i 9	. . 3 |- ( T. -> B = C )
3	2	csbeq2dv 3071	. 2 |- ( T. -> [_ A / x ]_ B = [_ A / x ]_ C )
4	3	mptru 1352	1 |- [_ A / x ]_ B = [_ A / x ]_ C

Syntax hints:   = wceq 1343   T. wtru 1344   [_csb 3045

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-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-11 1494  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-ext 2147

This theorem depends on definitions:  df-bi 116  df-tru 1346  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-sbc 2952  df-csb 3046

This theorem is referenced by:  csbvarg  3073  csbnest1g  3100  csbsng  3637  csbunig  3797  csbxpg  4685  csbcnvg  4788  csbdmg  4798  csbresg  4887  csbrng  5065  csbfv12g  5522  csbnegg  8096  iseqf1olemjpcl  10430  iseqf1olemqpcl  10431  iseqf1olemfvp  10432  seq3f1olemqsum  10435