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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 5720 | . 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 23656 | . . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌) ∧ 𝑃 ∈ 𝑌) → (𝑋 × {𝑃}) ∈ (𝐽 Cn 𝐾)) | |
| 6 | 2, 3, 4, 5 | syl3anc 1399 | . 2 ⊢ (𝜑 → (𝑋 × {𝑃}) ∈ (𝐽 Cn 𝐾)) |
| 7 | 1, 6 | eqeltrrid 2869 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 𝑃) ∈ (𝐽 Cn 𝐾)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2147 {csn 4588 ↦ cmpt 5192 × cxp 5656 ‘cfv 6566 (class class class)co 7451 TopOnctopon 23283 Cn ccn 23597 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 |
| 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 2102 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 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-fv 6574 df-ov 7454 df-oprab 7455 df-mpo 7456 df-1st 8035 df-2nd 8036 df-map 8887 df-topgen 17664 df-top 23267 df-topon 23284 df-cn 23600 df-cnp 23601 |
| This theorem is used by: cnmpt2c 24044 xkoinjcn 24061 txconn 24063 imasnopn 24064 imasncld 24065 imasncls 24066 istgp2 24465 tmdmulg 24466 tmdgsum 24469 tmdlactcn 24476 clsnsg 24484 tgpt0 24493 tlmtgp 24570 nmcn 25219 fsumcn 25246 expcn 25248 divccn 25249 cncfmptc 25288 cdivcncf 25297 iirevcn 25306 iihalf1cn 25308 iihalf2cn 25310 icchmeo 25317 evth 25335 evth2 25336 pcocn 25393 pcopt 25398 pcopt2 25399 pcoass 25400 csscld 25625 clsocv 25626 dvcnvlem 26351 plycn 26635 psercn2 26807 resqrtcn 27134 sqrtcn 27135 atansopn 27317 efrlim 27354 ipasslem7 31495 occllem 31962 rmulccn 34671 cxpcncf1 35335 txsconnlem 36213 cvxpconn 36215 cvmlift2lem2 36277 cvmlift2lem3 36278 cvmliftphtlem 36290 sinccvglem 36645 knoppcnlem10 37583 areacirclem2 38895 fprodcn 46885 |
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