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Mirrors > Home > MPE Home > Th. List > vtoclbg | Structured version Visualization version GIF version |
Description: Implicit substitution of a class for a setvar variable. (Contributed by NM, 29-Apr-1994.) |
Ref | Expression |
---|---|
vtoclbg.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) |
vtoclbg.2 | ⊢ (𝑥 = 𝐴 → (𝜓 ↔ 𝜃)) |
vtoclbg.3 | ⊢ (𝜑 ↔ 𝜓) |
Ref | Expression |
---|---|
vtoclbg | ⊢ (𝐴 ∈ 𝑉 → (𝜒 ↔ 𝜃)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vtoclbg.1 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜒)) | |
2 | vtoclbg.2 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜓 ↔ 𝜃)) | |
3 | 1, 2 | bibi12d 349 | . 2 ⊢ (𝑥 = 𝐴 → ((𝜑 ↔ 𝜓) ↔ (𝜒 ↔ 𝜃))) |
4 | vtoclbg.3 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
5 | 3, 4 | vtoclg 3515 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝜒 ↔ 𝜃)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 = wceq 1538 ∈ wcel 2111 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-cleq 2791 df-clel 2870 |
This theorem is referenced by: alexeqg 3592 pm13.183 3606 elabgw 3612 sbc8g 3728 sbc2or 3729 sbccow 3743 sbcco 3746 sbc5 3748 sbcie2g 3759 eqsbc3 3765 sbcng 3766 sbcimg 3767 sbcan 3768 sbcor 3769 sbcbig 3770 sbcal 3780 sbcex2 3781 sbcel1v 3786 sbcreu 3805 csbiebg 3860 sbcel12 4316 sbceqg 4317 csbie2df 4348 elpwgOLD 4504 preq12bg 4744 elintrabg 4851 sbcbr123 5084 inisegn0 5928 fsn2g 6877 funfvima3 6976 elixpsn 8484 ixpsnf1o 8485 domeng 8506 1sdom 8705 rankcf 10188 eldm3 33110 elima4 33132 brsset 33463 brbigcup 33472 elfix2 33478 elfunsg 33490 elsingles 33492 funpartlem 33516 ellines 33726 elhf2g 33750 cover2g 35153 sbcrexgOLD 39726 |
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