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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 6791 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
| 2 | 1 | ffnd 6732 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2147 {csn 4588 × cxp 5653 Fn wfn 6553 |
| 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 5252 ax-pr 5395 |
| 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-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-fun 6560 df-fn 6561 df-f 6562 |
| This theorem is used by: fconst2g 7232 ofc1 7745 ofc2 7746 caofid0l 7750 caofid0r 7751 caofid1 7752 caofid2 7753 fnsuppres 8236 fczsupp0 8238 fczfsuppd 9405 brwdom2 9594 cantnf0 9703 ofnegsub 12345 ofsubge0 12346 pwsplusgval 17691 pwsmulrval 17692 pwsvscafval 17695 pwsco1mhm 19057 dprdsubg 20270 pwsmgp 20586 pwssplit1 21364 frlmpwsfi 22088 frlmbas 22091 frlmvscaval 22104 islindf4 22174 psrascl 22316 matunitlindflem1 23024 matunitlindflem2 23025 tmdgsum2 24445 0plef 26023 0pledm 26024 itg1ge0 26037 mbfi1fseqlem5 26070 xrge0f 26082 itg2ge0 26086 itg2addlem 26109 bddibl 26190 dvidlem 26265 rolle 26340 dveq0 26350 dv11cn 26351 tdeglem4 26408 mdeg0 26418 fta1blem 26519 rnplynfin 26660 qaa 26677 basellem9 27446 noextendseq 28054 noetainflem4 28127 constcof 33287 fdifsuppconst 33353 elrspunidl 34048 ofcc 34808 ofcof 34809 eulerpartlemt 35073 ptrecube 38730 poimirlem1 38731 poimirlem2 38732 poimirlem3 38733 poimirlem4 38734 poimirlem5 38735 poimirlem6 38736 poimirlem7 38737 poimirlem10 38740 poimirlem11 38741 poimirlem12 38742 poimirlem16 38746 poimirlem17 38747 poimirlem19 38749 poimirlem20 38750 poimirlem22 38752 poimirlem23 38753 poimirlem28 38758 poimirlem29 38759 poimirlem31 38761 poimirlem32 38762 broucube 38764 cnpwstotbnd 38923 eqlkr2 40349 fsuppssind 43814 pwssplit4 44284 mpaaeu 44344 rngunsnply 44363 ofoaid1 44552 ofoaid2 44553 naddcnffo 44558 ofdivrec 45502 dvconstbi 45510 sqrtnnaa 48118 sqrtnzqaa 48119 zlmodzxzscm 49674 nelsubclem 50386 aacllem 51219 veroquadmodzerod 51264 |
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