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| Mirrors > Home > MPE Home > Th. List > fconst | Structured version Visualization version GIF version | ||
| Description: A Cartesian product with a singleton is a constant function. (Contributed by NM, 14-Aug-1999.) (Proof shortened by Andrew Salmon, 17-Sep-2011.) |
| Ref | Expression |
|---|---|
| fconst.1 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| fconst | ⊢ (𝐴 × {𝐵}):𝐴⟶{𝐵} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fconst.1 | . . 3 ⊢ 𝐵 ∈ V | |
| 2 | fconstmpt 5682 | . . 3 ⊢ (𝐴 × {𝐵}) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 3 | 1, 2 | fnmpti 6630 | . 2 ⊢ (𝐴 × {𝐵}) Fn 𝐴 |
| 4 | rnxpss 6125 | . 2 ⊢ ran (𝐴 × {𝐵}) ⊆ {𝐵} | |
| 5 | df-f 6491 | . 2 ⊢ ((𝐴 × {𝐵}):𝐴⟶{𝐵} ↔ ((𝐴 × {𝐵}) Fn 𝐴 ∧ ran (𝐴 × {𝐵}) ⊆ {𝐵})) | |
| 6 | 3, 4, 5 | mpbir2an 712 | 1 ⊢ (𝐴 × {𝐵}):𝐴⟶{𝐵} |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 Vcvv 3427 ⊆ wss 3885 {csn 4557 × cxp 5618 ran crn 5621 Fn wfn 6482 ⟶wf 6483 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2184 ax-ext 2707 ax-sep 5220 ax-pr 5364 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-ral 3050 df-rex 3060 df-rab 3388 df-v 3429 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4264 df-if 4457 df-sn 4558 df-pr 4560 df-op 4564 df-br 5075 df-opab 5137 df-mpt 5156 df-id 5515 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-fun 6489 df-fn 6490 df-f 6491 |
| This theorem is referenced by: fconstg 6716 fodomr 9055 fodomfir 9227 ofsubeq0 12145 ser0f 14006 hashgval 14284 hashinf 14286 hashfxnn0 14288 prodf1f 15846 pwssplit1 21043 psrbag0 22029 xkofvcn 23637 rrx0el 25353 ibl0 25742 dvcmul 25899 dvcmulf 25900 dvexp 25908 elqaalem3 26275 basellem7 27038 basellem9 27040 noetasuplem4 27688 axlowdimlem8 29006 axlowdimlem9 29007 axlowdimlem10 29008 axlowdimlem11 29009 axlowdimlem12 29010 0oo 30848 occllem 31362 ho01i 31887 nlelchi 32120 hmopidmchi 32210 elrgspnlem1 33291 gsumind 33393 esplyfval0 33696 eulerpartlemt 34503 plymul02 34678 breprexpnat 34766 fullfunfnv 36116 fullfunfv 36117 poimirlem16 37945 poimirlem19 37948 poimirlem23 37952 poimirlem24 37953 poimirlem25 37954 poimirlem28 37957 poimirlem29 37958 poimirlem30 37959 poimirlem31 37960 poimirlem32 37961 ftc1anclem5 38006 lfl0f 39503 diophrw 43179 pwssplit4 43505 ofsubid 44739 dvsconst 44745 dvsid 44746 binomcxplemnn0 44764 binomcxplemnotnn0 44771 functermc 49971 aacllem 50264 |
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