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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 24116 | . 2 ⊢ (𝐽 ≃ 𝐾 → 𝐾 ≃ 𝐽) | |
| 2 | hmphsym 24116 | . 2 ⊢ (𝐾 ≃ 𝐽 → 𝐽 ≃ 𝐾) | |
| 3 | 1, 2 | impbii 212 | 1 ⊢ (𝐽 ≃ 𝐾 ↔ 𝐾 ≃ 𝐽) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 class class class wbr 5106 ≃ chmph 24088 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7761 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-suc 6375 df-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-fv 6555 df-ov 7433 df-oprab 7434 df-mpo 7435 df-1st 8011 df-2nd 8012 df-1o 8490 df-map 8863 df-top 23227 df-topon 23244 df-cn 23560 df-hmeo 24089 df-hmph 24090 |
| This theorem is used by: ismntop 34714 |
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