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| Mirrors > Home > MPE Home > Th. List > idhmeo | Structured version Visualization version GIF version | ||
| Description: The identity function is a homeomorphism. (Contributed by FL, 14-Feb-2007.) (Proof shortened by Mario Carneiro, 23-Aug-2015.) |
| Ref | Expression |
|---|---|
| idhmeo | ⊢ (𝐽 ∈ (TopOn‘𝑋) → ( I ↾ 𝑋) ∈ (𝐽Homeo𝐽)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | idcn 23590 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝑋) → ( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽)) | |
| 2 | cnvresid 6630 | . . 3 ⊢ ◡( I ↾ 𝑋) = ( I ↾ 𝑋) | |
| 3 | 2, 1 | eqeltrid 2868 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝑋) → ◡( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽)) |
| 4 | ishmeo 24093 | . 2 ⊢ (( I ↾ 𝑋) ∈ (𝐽Homeo𝐽) ↔ (( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽) ∧ ◡( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽))) | |
| 5 | 1, 3, 4 | sylanbrc 595 | 1 ⊢ (𝐽 ∈ (TopOn‘𝑋) → ( I ↾ 𝑋) ∈ (𝐽Homeo𝐽)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2146 I cid 5549 ◡ccnv 5654 ↾ cres 5657 ‘cfv 6547 (class class class)co 7430 TopOnctopon 23243 Cn ccn 23557 Homeochmeo 24087 |
| 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-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-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-iota 6501 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-ov 7433 df-oprab 7434 df-mpo 7435 df-map 8863 df-top 23227 df-topon 23244 df-cn 23560 df-hmeo 24089 |
| This theorem is used by: hmphref 24115 |
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