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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 335 | . 2 ⊢ (𝑥 = 𝐴 → ((𝜑 ↔ 𝜓) ↔ (𝜒 ↔ 𝜃))) |
4 | vtoclbg.3 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
5 | 3, 4 | vtoclg 3266 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝜒 ↔ 𝜃)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 = wceq 1483 ∈ wcel 1990 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-12 2047 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-v 3202 |
This theorem is referenced by: alexeqg 3332 pm13.183 3344 sbc8g 3443 sbc2or 3444 sbcco 3458 sbc5 3460 sbcie2g 3469 eqsbc3 3475 sbcng 3476 sbcimg 3477 sbcan 3478 sbcor 3479 sbcbig 3480 sbcal 3485 sbcex2 3486 sbcel1v 3495 sbcreu 3515 csbiebg 3556 sbcel12 3983 sbceqg 3984 elpwg 4166 snssg 4327 preq12bg 4386 elintgOLD 4484 elintrabg 4489 sbcbr123 4706 opelresg 5404 inisegn0 5497 funfvima3 6495 elixpsn 7947 ixpsnf1o 7948 domeng 7969 1sdom 8163 rankcf 9599 eldm3 31651 br1steqgOLD 31674 br2ndeqgOLD 31675 elima4 31679 brsset 31996 brbigcup 32005 elfix2 32011 elfunsg 32023 elsingles 32025 funpartlem 32049 ellines 32259 elhf2g 32283 cover2g 33509 sbcrexgOLD 37349 sbcangOLD 38739 sbcorgOLD 38740 sbcalgOLD 38752 sbcexgOLD 38753 sbcel12gOLD 38754 sbcel1gvOLD 39094 |
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