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| Mirrors > Home > MPE Home > Th. List > idcn | Structured version Visualization version GIF version | ||
| Description: A restricted identity function is a continuous function. (Contributed by FL, 27-Dec-2006.) (Proof shortened by Mario Carneiro, 21-Mar-2015.) |
| Ref | Expression |
|---|---|
| idcn | ⊢ (𝐽 ∈ (TopOn‘𝑋) → ( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssid 3945 | . 2 ⊢ 𝐽 ⊆ 𝐽 | |
| 2 | ssidcn 23233 | . . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐽 ∈ (TopOn‘𝑋)) → (( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽) ↔ 𝐽 ⊆ 𝐽)) | |
| 3 | 2 | anidms 566 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝑋) → (( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽) ↔ 𝐽 ⊆ 𝐽)) |
| 4 | 1, 3 | mpbiri 258 | 1 ⊢ (𝐽 ∈ (TopOn‘𝑋) → ( I ↾ 𝑋) ∈ (𝐽 Cn 𝐽)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∈ wcel 2114 ⊆ wss 3890 I cid 5519 ↾ cres 5627 ‘cfv 6493 (class class class)co 7361 TopOnctopon 22888 Cn ccn 23202 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-ov 7364 df-oprab 7365 df-mpo 7366 df-map 8769 df-top 22872 df-topon 22889 df-cn 23205 |
| This theorem is referenced by: resthauslem 23341 kgencn2 23535 txkgen 23630 cnmptid 23639 idhmeo 23751 qtophmeo 23795 pl1cn 34118 rrhre 34184 |
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