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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 6761 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
| 2 | 1 | ffnd 6702 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 {csn 4584 × cxp 5649 Fn wfn 6526 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-pr 5391 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-fun 6533 df-fn 6534 df-f 6535 |
| This theorem is used by: fconst2g 7201 ofc1 7710 ofc2 7711 caofid0l 7715 caofid0r 7716 caofid1 7717 caofid2 7718 fnsuppres 8192 fczsupp0 8194 fczfsuppd 9362 brwdom2 9551 cantnf0 9660 ofnegsub 12299 ofsubge0 12300 pwsplusgval 17642 pwsmulrval 17643 pwsvscafval 17646 pwsco1mhm 19008 dprdsubg 20220 pwsmgp 20536 pwssplit1 21314 frlmpwsfi 22038 frlmbas 22041 frlmvscaval 22054 islindf4 22124 psrascl 22266 matunitlindflem1 22974 matunitlindflem2 22975 tmdgsum2 24395 0plef 25973 0pledm 25974 itg1ge0 25987 mbfi1fseqlem5 26020 xrge0f 26032 itg2ge0 26036 itg2addlem 26059 bddibl 26140 dvidlem 26215 rolle 26290 dveq0 26300 dv11cn 26301 tdeglem4 26358 mdeg0 26368 fta1blem 26469 rnplynfin 26612 qaa 26629 basellem9 27398 noextendseq 28006 noetainflem4 28079 constcof 33197 fdifsuppconst 33264 elrspunidl 33960 ofcc 34720 ofcof 34721 eulerpartlemt 34986 ptrecube 38506 poimirlem1 38507 poimirlem2 38508 poimirlem3 38509 poimirlem4 38510 poimirlem5 38511 poimirlem6 38512 poimirlem7 38513 poimirlem10 38516 poimirlem11 38517 poimirlem12 38518 poimirlem16 38522 poimirlem17 38523 poimirlem19 38525 poimirlem20 38526 poimirlem22 38528 poimirlem23 38529 poimirlem28 38534 poimirlem29 38535 poimirlem31 38537 poimirlem32 38538 broucube 38540 cnpwstotbnd 38699 eqlkr2 40125 fsuppssind 43583 pwssplit4 44049 mpaaeu 44110 rngunsnply 44129 ofoaid1 44318 ofoaid2 44319 naddcnffo 44324 ofdivrec 45269 dvconstbi 45277 sqrtnnaa 47857 sqrtnzqaa 47858 zlmodzxzscm 49413 nelsubclem 50119 aacllem 50883 veroquadmodzerod 50928 |
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