Theorem cbvopabv 4631

Description: Rule used to change bound variables in an ordered-pair class abstraction, using implicit substitution. (Contributed by NM, 15-Oct-1996.)

Hypothesis

Ref	Expression
cbvopabv.1	⊢ ((x = z ∧ y = w) → (φ ↔ ψ))

Assertion

Ref	Expression
cbvopabv	⊢ {⟨x, y⟩ ∣ φ} = {⟨z, w⟩ ∣ ψ}

Distinct variable groups:   x,y,z,w   φ,z,w   ψ,x,y

Allowed substitution hints:   φ(x,y)   ψ(z,w)

Proof of Theorem cbvopabv

Step	Hyp	Ref	Expression
1		nfv 1619	. 2 ⊢ Ⅎzφ
2		nfv 1619	. 2 ⊢ Ⅎwφ
3		nfv 1619	. 2 ⊢ Ⅎxψ
4		nfv 1619	. 2 ⊢ Ⅎyψ
5		cbvopabv.1	. 2 ⊢ ((x = z ∧ y = w) → (φ ↔ ψ))
6	1, 2, 3, 4, 5	cbvopab 4630	1 ⊢ {⟨x, y⟩ ∣ φ} = {⟨z, w⟩ ∣ ψ}

Syntax hints:   → wi 4   ↔ wb 176   ∧ wa 358   = wceq 1642  {copab 4622

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4078  ax-xp 4079  ax-cnv 4080  ax-1c 4081  ax-sset 4082  ax-si 4083  ax-ins2 4084  ax-ins3 4085  ax-typlower 4086  ax-sn 4087

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ne 2518  df-ral 2619  df-rex 2620  df-v 2861  df-sbc 3047  df-nin 3211  df-compl 3212  df-in 3213  df-un 3214  df-dif 3215  df-symdif 3216  df-ss 3259  df-nul 3551  df-if 3663  df-pw 3724  df-sn 3741  df-pr 3742  df-uni 3892  df-int 3927  df-opk 4058  df-1c 4136  df-pw1 4137  df-uni1 4138  df-xpk 4185  df-cnvk 4186  df-ins2k 4187  df-ins3k 4188  df-imak 4189  df-cok 4190  df-p6 4191  df-sik 4192  df-ssetk 4193  df-imagek 4194  df-idk 4195  df-addc 4378  df-nnc 4379  df-phi 4565  df-op 4566  df-opab 4623

This theorem is referenced by: (None)