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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 5713 | . 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 23601 | . . 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 2866 | 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 5649 ‘cfv 6538 (class class class)co 7420 TopOnctopon 23228 Cn ccn 23542 |
| 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 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 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 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-map 8849 df-topgen 17614 df-top 23212 df-topon 23229 df-cn 23545 df-cnp 23546 |
| This theorem is used by: cnmpt2c 23989 xkoinjcn 24006 txconn 24008 imasnopn 24009 imasncld 24010 imasncls 24011 istgp2 24410 tmdmulg 24411 tmdgsum 24414 tmdlactcn 24421 clsnsg 24429 tgpt0 24438 tlmtgp 24515 nmcn 25164 fsumcn 25191 expcn 25193 divccn 25194 cncfmptc 25233 cdivcncf 25242 iirevcn 25251 iihalf1cn 25253 iihalf2cn 25255 icchmeo 25262 evth 25280 evth2 25281 pcocn 25338 pcopt 25343 pcopt2 25344 pcoass 25345 csscld 25570 clsocv 25571 dvcnvlem 26296 plycn 26580 psercn2 26750 resqrtcn 27077 sqrtcn 27078 atansopn 27260 efrlim 27297 ipasslem7 31438 occllem 31905 rmulccn 34560 cxpcncf1 35224 txsconnlem 36005 cvxpconn 36007 cvmlift2lem2 36069 cvmlift2lem3 36070 cvmliftphtlem 36082 sinccvglem 36437 knoppcnlem10 37368 areacirclem2 38627 fprodcn 46611 |
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