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Mirrors > Home > MPE Home > Th. List > hmphsymb | Structured version Visualization version GIF version |
Description: "Is homeomorphic to" is symmetric. (Contributed by FL, 22-Feb-2007.) |
Ref | Expression |
---|---|
hmphsymb | ⊢ (𝐽 ≃ 𝐾 ↔ 𝐾 ≃ 𝐽) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | hmphsym 23039 | . 2 ⊢ (𝐽 ≃ 𝐾 → 𝐾 ≃ 𝐽) | |
2 | hmphsym 23039 | . 2 ⊢ (𝐾 ≃ 𝐽 → 𝐽 ≃ 𝐾) | |
3 | 1, 2 | impbii 208 | 1 ⊢ (𝐽 ≃ 𝐾 ↔ 𝐾 ≃ 𝐽) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 205 class class class wbr 5092 ≃ chmph 23011 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2707 ax-sep 5243 ax-nul 5250 ax-pow 5308 ax-pr 5372 ax-un 7650 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2886 df-ne 2941 df-ral 3062 df-rex 3071 df-rab 3404 df-v 3443 df-sbc 3728 df-csb 3844 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4270 df-if 4474 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4853 df-iun 4943 df-br 5093 df-opab 5155 df-mpt 5176 df-id 5518 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-suc 6308 df-iota 6431 df-fun 6481 df-fn 6482 df-f 6483 df-fv 6487 df-ov 7340 df-oprab 7341 df-mpo 7342 df-1st 7899 df-2nd 7900 df-1o 8367 df-map 8688 df-top 22149 df-topon 22166 df-cn 22484 df-hmeo 23012 df-hmph 23013 |
This theorem is referenced by: ismntop 32274 |
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