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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 348 | . 2 ⊢ (𝑥 = 𝐴 → ((𝜑 ↔ 𝜓) ↔ (𝜒 ↔ 𝜃))) |
4 | vtoclbg.3 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
5 | 3, 4 | vtoclg 3567 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝜒 ↔ 𝜃)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 = wceq 1533 ∈ wcel 2110 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-12 2173 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1777 df-nf 1781 df-cleq 2814 df-clel 2893 |
This theorem is referenced by: alexeqg 3643 pm13.183 3658 pm13.183OLD 3659 sbc8g 3779 sbc2or 3780 sbccow 3794 sbcco 3797 sbc5 3799 sbcie2g 3810 eqsbc3 3816 eqsbc3OLD 3817 sbcng 3818 sbcimg 3819 sbcan 3820 sbcor 3821 sbcbig 3822 sbcal 3832 sbcex2 3833 sbcel1v 3838 sbcel1vOLD 3839 sbcreu 3858 csbiebg 3914 sbcel12 4359 sbceqg 4360 csbie2df 4391 elpwgOLD 4545 preq12bg 4783 elintrabg 4888 sbcbr123 5119 inisegn0 5960 fsn2g 6899 funfvima3 6997 elixpsn 8500 ixpsnf1o 8501 domeng 8522 1sdom 8720 rankcf 10198 eldm3 32997 elima4 33019 brsset 33350 brbigcup 33359 elfix2 33365 elfunsg 33377 elsingles 33379 funpartlem 33403 ellines 33613 elhf2g 33637 cover2g 34989 sbcrexgOLD 39380 |
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