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| Mirrors > Home > MPE Home > Th. List > fnconstg | Structured version Visualization version GIF version | ||
| Description: A Cartesian product with a singleton is a constant function. (Contributed by NM, 24-Jul-2014.) |
| Ref | Expression |
|---|---|
| fnconstg | ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fconstg 6769 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
| 2 | 1 | ffnd 6710 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 {csn 4584 × cxp 5648 Fn wfn 6533 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-fun 6540 df-fn 6541 df-f 6542 |
| This theorem is used by: fconst2g 7209 ofc1 7721 ofc2 7722 caofid0l 7726 caofid0r 7727 caofid1 7728 caofid2 7729 fnsuppres 8211 fczsupp0 8213 fczfsuppd 9381 brwdom2 9570 cantnf0 9679 ofnegsub 12321 ofsubge0 12322 pwsplusgval 17667 pwsmulrval 17668 pwsvscafval 17671 pwsco1mhm 19033 dprdsubg 20245 pwsmgp 20561 pwssplit1 21339 frlmpwsfi 22063 frlmbas 22066 frlmvscaval 22079 islindf4 22149 psrascl 22291 matunitlindflem1 22999 matunitlindflem2 23000 tmdgsum2 24420 0plef 25998 0pledm 25999 itg1ge0 26012 mbfi1fseqlem5 26045 xrge0f 26057 itg2ge0 26061 itg2addlem 26084 bddibl 26165 dvidlem 26240 rolle 26315 dveq0 26325 dv11cn 26326 tdeglem4 26383 mdeg0 26393 fta1blem 26494 rnplynfin 26635 qaa 26652 basellem9 27421 noextendseq 28029 noetainflem4 28102 constcof 33262 fdifsuppconst 33329 elrspunidl 34024 ofcc 34784 ofcof 34785 eulerpartlemt 35049 ptrecube 38631 poimirlem1 38632 poimirlem2 38633 poimirlem3 38634 poimirlem4 38635 poimirlem5 38636 poimirlem6 38637 poimirlem7 38638 poimirlem10 38641 poimirlem11 38642 poimirlem12 38643 poimirlem16 38647 poimirlem17 38648 poimirlem19 38650 poimirlem20 38651 poimirlem22 38653 poimirlem23 38654 poimirlem28 38659 poimirlem29 38660 poimirlem31 38662 poimirlem32 38663 broucube 38665 cnpwstotbnd 38824 eqlkr2 40250 fsuppssind 43714 pwssplit4 44184 mpaaeu 44245 rngunsnply 44264 ofoaid1 44453 ofoaid2 44454 naddcnffo 44459 ofdivrec 45403 dvconstbi 45411 sqrtnnaa 48006 sqrtnzqaa 48007 zlmodzxzscm 49562 nelsubclem 50274 aacllem 51107 veroquadmodzerod 51152 |
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