Theorem rabeq 2813

Description: Equality theorem for restricted class abstractions. (Contributed by NM, 15-Oct-2003.)

Assertion

Ref	Expression
rabeq	|- ( A = B -> { x e. A | ph } = { x e. B | ph } )

Distinct variable groups:   x, A   x, B

Allowed substitution hint:   ph( x)

Proof of Theorem rabeq

Step	Hyp	Ref	Expression
1		nfcv 2392	. 2 |- F/_ x A
2		nfcv 2392	. 2 |- F/_ x B
3	1, 2	rabeqf 2811	1 |- ( A = B -> { x e. A | ph } = { x e. B | ph } )

This proof depends on syntax axioms:   -> wi 4   = wceq 1402   {crab 2532

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rab 2537

This theorem is used by:  rabeqdv  2815  rabeqbidv  2816  rabeqbidva  2817  difeq1  3340  ifeq1  3643  ifeq2  3644  elfvmptrab  5802  supp0  6478  pmvalg  6933  unfiexmid  7225  ssfirab  7244  supeq2  7329  iooval2  10317  fzval2  10414  clsfval  15202  incistruhgr  16331