Theorem csbeq2i 3085

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 3084	. 2 |- ( T. -> [_ A / x ]_ B = [_ A / x ]_ C )
4	3	mptru 1362	1 |- [_ A / x ]_ B = [_ A / x ]_ C

Syntax hints:   = wceq 1353   T. wtru 1354   [_csb 3058

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-11 1506  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159

This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-sbc 2964  df-csb 3059

This theorem is referenced by:  csbvarg  3086  csbnest1g  3113  csbsng  3654  csbunig  3818  csbxpg  4708  csbcnvg  4812  csbdmg  4822  csbresg  4911  csbrng  5091  csbfv12g  5552  csbnegg  8155  iseqf1olemjpcl  10495  iseqf1olemqpcl  10496  iseqf1olemfvp  10497  seq3f1olemqsum  10500