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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 6092 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
2 | ffn 6045 | . 2 ⊢ ((𝐴 × {𝐵}):𝐴⟶{𝐵} → (𝐴 × {𝐵}) Fn 𝐴) | |
3 | 1, 2 | syl 17 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 1990 {csn 4177 × cxp 5112 Fn wfn 5883 ⟶wf 5884 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-fun 5890 df-fn 5891 df-f 5892 |
This theorem is referenced by: fconst2g 6468 ofc1 6920 ofc2 6921 caofid0l 6925 caofid0r 6926 caofid1 6927 caofid2 6928 fnsuppres 7322 fczsupp0 7324 fczfsuppd 8293 brwdom2 8478 cantnf0 8572 ofnegsub 11018 ofsubge0 11019 pwsplusgval 16150 pwsmulrval 16151 pwsvscafval 16154 xpsc0 16220 xpsc1 16221 pwsco1mhm 17370 dprdsubg 18423 pwsmgp 18618 pwssplit1 19059 frlmpwsfi 20096 frlmbas 20099 frlmvscaval 20110 islindf4 20177 tmdgsum2 21900 0plef 23439 0pledm 23440 itg1ge0 23453 mbfi1fseqlem5 23486 xrge0f 23498 itg2ge0 23502 itg2addlem 23525 bddibl 23606 dvidlem 23679 rolle 23753 dveq0 23763 dv11cn 23764 tdeglem4 23820 mdeg0 23830 fta1blem 23928 qaa 24078 basellem9 24815 ofcc 30168 ofcof 30169 eulerpartlemt 30433 noextendseq 31820 matunitlindflem1 33405 matunitlindflem2 33406 ptrecube 33409 poimirlem1 33410 poimirlem2 33411 poimirlem3 33412 poimirlem4 33413 poimirlem5 33414 poimirlem6 33415 poimirlem7 33416 poimirlem10 33419 poimirlem11 33420 poimirlem12 33421 poimirlem16 33425 poimirlem17 33426 poimirlem19 33428 poimirlem20 33429 poimirlem22 33431 poimirlem23 33432 poimirlem28 33437 poimirlem29 33438 poimirlem31 33440 poimirlem32 33441 broucube 33443 cnpwstotbnd 33596 eqlkr2 34387 pwssplit4 37659 mpaaeu 37720 rngunsnply 37743 ofdivrec 38525 dvconstbi 38533 zlmodzxzscm 42135 aacllem 42547 |
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