Theorem csbie 3170

Description: Conversion of implicit substitution to explicit substitution into a class. (Contributed by AV, 2-Dec-2019.)

Hypotheses

Ref	Expression
csbie.1	|- A e. _V
csbie.2	|- ( x = A -> B = C )

Assertion

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

Distinct variable groups:   x, A   x, C

Allowed substitution hint:   B( x)

Proof of Theorem csbie

Step	Hyp	Ref	Expression
1		csbie.1	. 2 |- A e. _V
2		nfcv 2372	. 2 |- F/_ x C
3		csbie.2	. 2 |- ( x = A -> B = C )
4	1, 2, 3	csbief 3169	1 |- [_ A / x ]_ B = C

Syntax hints:   -> wi 4   = wceq 1395   e. wcel 2200   _Vcvv 2799   [_csb 3124

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-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2801  df-sbc 3029  df-csb 3125

This theorem is referenced by:  fsumcnv  11943  fisum0diag2  11953  fprodcnv  12131