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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 5694 | . 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 23239 | . . 3 ⊢ ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌) ∧ 𝑃 ∈ 𝑌) → (𝑋 × {𝑃}) ∈ (𝐽 Cn 𝐾)) | |
| 6 | 2, 3, 4, 5 | syl3anc 1374 | . 2 ⊢ (𝜑 → (𝑋 × {𝑃}) ∈ (𝐽 Cn 𝐾)) |
| 7 | 1, 6 | eqeltrrid 2842 | 1 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 𝑃) ∈ (𝐽 Cn 𝐾)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 {csn 4582 ↦ cmpt 5181 × cxp 5630 ‘cfv 6500 (class class class)co 7368 TopOnctopon 22866 Cn ccn 23180 |
| 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 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| 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 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-fv 6508 df-ov 7371 df-oprab 7372 df-mpo 7373 df-1st 7943 df-2nd 7944 df-map 8777 df-topgen 17375 df-top 22850 df-topon 22867 df-cn 23183 df-cnp 23184 |
| This theorem is referenced by: cnmpt2c 23626 xkoinjcn 23643 txconn 23645 imasnopn 23646 imasncld 23647 imasncls 23648 istgp2 24047 tmdmulg 24048 tmdgsum 24051 tmdlactcn 24058 clsnsg 24066 tgpt0 24075 tlmtgp 24152 nmcn 24801 fsumcn 24829 expcn 24831 divccn 24832 expcnOLD 24833 divccnOLD 24834 cncfmptc 24873 cdivcncf 24882 iirevcn 24892 iihalf1cn 24894 iihalf1cnOLD 24895 iihalf2cn 24897 iihalf2cnOLD 24898 icchmeo 24906 icchmeoOLD 24907 evth 24926 evth2 24927 pcocn 24985 pcopt 24990 pcopt2 24991 pcoass 24992 csscld 25217 clsocv 25218 dvcnvlem 25948 plycn 26234 plycnOLD 26235 psercn2 26400 psercn2OLD 26401 resqrtcn 26727 sqrtcn 26728 atansopn 26910 efrlim 26947 efrlimOLD 26948 ipasslem7 30924 occllem 31391 rmulccn 34106 cxpcncf1 34773 txsconnlem 35456 cvxpconn 35458 cvmlift2lem2 35520 cvmlift2lem3 35521 cvmliftphtlem 35533 sinccvglem 35888 knoppcnlem10 36724 areacirclem2 37960 fprodcn 45960 |
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