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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 6772 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
| 2 | 1 | ffnd 6713 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2146 {csn 4594 × cxp 5664 Fn wfn 6538 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2738 ax-sep 5262 ax-pr 5409 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-fun 6545 df-fn 6546 df-f 6547 |
| This theorem is used by: fconst2g 7208 ofc1 7715 ofc2 7716 caofid0l 7720 caofid0r 7721 caofid1 7722 caofid2 7723 fnsuppres 8196 fczsupp0 8198 fczfsuppd 9356 brwdom2 9545 cantnf0 9654 ofnegsub 12234 ofsubge0 12235 pwsplusgval 17569 pwsmulrval 17570 pwsvscafval 17573 pwsco1mhm 18922 dprdsubg 20127 pwsmgp 20441 pwssplit1 21217 frlmpwsfi 21939 frlmbas 21942 frlmvscaval 21955 islindf4 22025 psrascl 22165 tmdgsum2 24290 0plef 25868 0pledm 25869 itg1ge0 25882 mbfi1fseqlem5 25915 xrge0f 25927 itg2ge0 25931 itg2addlem 25954 bddibl 26036 dvidlem 26111 rolle 26186 dveq0 26196 dv11cn 26197 tdeglem4 26254 mdeg0 26264 fta1blem 26365 qaa 26521 basellem9 27290 noextendseq 27868 noetainflem4 27941 constcof 33003 fdifsuppconst 33071 elrspunidl 33767 ofcc 34527 ofcof 34528 eulerpartlemt 34793 matunitlindflem1 38308 matunitlindflem2 38309 ptrecube 38312 poimirlem1 38313 poimirlem2 38314 poimirlem3 38315 poimirlem4 38316 poimirlem5 38317 poimirlem6 38318 poimirlem7 38319 poimirlem10 38322 poimirlem11 38323 poimirlem12 38324 poimirlem16 38328 poimirlem17 38329 poimirlem19 38331 poimirlem20 38332 poimirlem22 38334 poimirlem23 38335 poimirlem28 38340 poimirlem29 38341 poimirlem31 38343 poimirlem32 38344 broucube 38346 cnpwstotbnd 38489 eqlkr2 39915 fsuppssind 43366 pwssplit4 43857 mpaaeu 43918 rngunsnply 43937 ofoaid1 44126 ofoaid2 44127 naddcnffo 44132 ofdivrec 45077 dvconstbi 45085 sqrtnnaa 47645 sqrtnzqaa 47646 zlmodzxzscm 49178 nelsubclem 49886 aacllem 50662 |
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