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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 6766 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
| 2 | 1 | ffnd 6707 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 {csn 4587 × cxp 5657 Fn wfn 6532 |
| 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 2215 ax-ext 2734 ax-sep 5255 ax-pr 5402 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-fun 6539 df-fn 6540 df-f 6541 |
| This theorem is used by: fconst2g 7206 ofc1 7710 ofc2 7711 caofid0l 7715 caofid0r 7716 caofid1 7717 caofid2 7718 fnsuppres 8193 fczsupp0 8195 fczfsuppd 9360 brwdom2 9549 cantnf0 9658 ofnegsub 12244 ofsubge0 12245 pwsplusgval 17582 pwsmulrval 17583 pwsvscafval 17586 pwsco1mhm 18947 dprdsubg 20159 pwsmgp 20473 pwssplit1 21249 frlmpwsfi 21971 frlmbas 21974 frlmvscaval 21987 islindf4 22057 psrascl 22199 matunitlindflem1 22907 matunitlindflem2 22908 tmdgsum2 24328 0plef 25906 0pledm 25907 itg1ge0 25920 mbfi1fseqlem5 25953 xrge0f 25965 itg2ge0 25969 itg2addlem 25992 bddibl 26074 dvidlem 26149 rolle 26224 dveq0 26234 dv11cn 26235 tdeglem4 26292 mdeg0 26302 fta1blem 26403 rnplynfin 26546 qaa 26563 basellem9 27333 noextendseq 27911 noetainflem4 27984 constcof 33102 fdifsuppconst 33169 elrspunidl 33864 ofcc 34624 ofcof 34625 eulerpartlemt 34890 ptrecube 38377 poimirlem1 38378 poimirlem2 38379 poimirlem3 38380 poimirlem4 38381 poimirlem5 38382 poimirlem6 38383 poimirlem7 38384 poimirlem10 38387 poimirlem11 38388 poimirlem12 38389 poimirlem16 38393 poimirlem17 38394 poimirlem19 38396 poimirlem20 38397 poimirlem22 38399 poimirlem23 38400 poimirlem28 38405 poimirlem29 38406 poimirlem31 38408 poimirlem32 38409 broucube 38411 cnpwstotbnd 38555 eqlkr2 39981 fsuppssind 43447 pwssplit4 43938 mpaaeu 43999 rngunsnply 44018 ofoaid1 44207 ofoaid2 44208 naddcnffo 44213 ofdivrec 45158 dvconstbi 45166 sqrtnnaa 47739 sqrtnzqaa 47740 zlmodzxzscm 49295 nelsubclem 50001 aacllem 50780 veroquadmodzerod 50825 |
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