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| Mirrors > Home > MPE Home > Th. List > cnmptc | Structured version Visualization version GIF version | ||
| Description: A constant function is continuous. (Contributed by Mario Carneiro, 5-May-2014.) (Revised by Mario Carneiro, 22-Aug-2015.) |
| Ref | Expression |
|---|---|
| cnmptid.j | ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋)) |
| cnmptc.k | ⊢ (𝜑 → 𝐾 ∈ (TopOn‘𝑌)) |
| cnmptc.p | ⊢ (𝜑 → 𝑃 ∈ 𝑌) |
| Ref | Expression |
|---|---|
| cnmptc | ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 𝑃) ∈ (𝐽 Cn 𝐾)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fconstmpt 5717 | . 2 ⊢ (𝑋 × {𝑃}) = (𝑥 ∈ 𝑋 ↦ 𝑃) | |
| 2 | cnmptid.j | . . 3 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋)) | |
| 3 | cnmptc.k | . . 3 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘𝑌)) | |
| 4 | cnmptc.p | . . 3 ⊢ (𝜑 → 𝑃 ∈ 𝑌) | |
| 5 | cnconst2 23509 | . . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌) ∧ 𝑃 ∈ 𝑌) → (𝑋 × {𝑃}) ∈ (𝐽 Cn 𝐾)) | |
| 6 | 2, 3, 4, 5 | syl3anc 1398 | . 2 ⊢ (𝜑 → (𝑋 × {𝑃}) ∈ (𝐽 Cn 𝐾)) |
| 7 | 1, 6 | eqeltrrid 2865 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 𝑃) ∈ (𝐽 Cn 𝐾)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 {csn 4584 ↦ cmpt 5186 × cxp 5653 ‘cfv 6533 (class class class)co 7414 TopOnctopon 23136 Cn ccn 23450 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 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 6489 df-fun 6535 df-fn 6536 df-f 6537 df-fv 6541 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7987 df-2nd 7988 df-map 8829 df-topgen 17529 df-top 23120 df-topon 23137 df-cn 23453 df-cnp 23454 |
| This theorem is used by: cnmpt2c 23897 xkoinjcn 23914 txconn 23916 imasnopn 23917 imasncld 23918 imasncls 23919 istgp2 24318 tmdmulg 24319 tmdgsum 24322 tmdlactcn 24329 clsnsg 24337 tgpt0 24346 tlmtgp 24423 nmcn 25072 fsumcn 25099 expcn 25101 divccn 25102 cncfmptc 25141 cdivcncf 25150 iirevcn 25159 iihalf1cn 25161 iihalf2cn 25163 icchmeo 25170 evth 25188 evth2 25189 pcocn 25246 pcopt 25251 pcopt2 25252 pcoass 25253 csscld 25478 clsocv 25479 dvcnvlem 26204 plycn 26488 psercn2 26660 resqrtcn 26987 sqrtcn 26988 atansopn 27170 efrlim 27207 ipasslem7 31318 occllem 31785 rmulccn 34439 cxpcncf1 35104 txsconnlem 35820 cvxpconn 35822 cvmlift2lem2 35884 cvmlift2lem3 35885 cvmliftphtlem 35897 sinccvglem 36252 knoppcnlem10 37200 areacirclem2 38459 fprodcn 46431 |
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