| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5717 | . . 3 ⊢ (𝐴 × {𝐵}) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 3 | 1, 2 | fnmpti 6704 | . 2 ⊢ (𝐴 × {𝐵}) Fn 𝐴 |
| 4 | rnxpss 6176 | . 2 ⊢ ran (𝐴 × {𝐵}) ⊆ {𝐵} | |
| 5 | df-f 6562 | . 2 ⊢ ((𝐴 × {𝐵}):𝐴⟶{𝐵} ↔ ((𝐴 × {𝐵}) Fn 𝐴 ∧ ran (𝐴 × {𝐵}) ⊆ {𝐵})) | |
| 6 | 3, 4, 5 | mpbir2an 724 | 1 ⊢ (𝐴 × {𝐵}):𝐴⟶{𝐵} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 Vcvv 3454 ⊆ wss 3900 {csn 4588 × cxp 5653 ran crn 5656 Fn wfn 6553 ⟶wf 6554 |
| 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: fconstg 6791 fodomr 9175 fodomfir 9347 ofsubeq0 12344 ser0f 14225 hashgval 14504 hashinf 14506 hashfxnn0 14508 prodf1f 16090 pwssplit1 21364 psrbag0 22401 xkofvcn 24033 rrx0el 25749 ibl0 26137 dvcmul 26294 dvcmulf 26295 dvexp 26303 plymul02 26631 elqaalem3 26674 basellem7 27444 basellem9 27446 noetasuplem4 28123 axlowdimlem8 29557 axlowdimlem9 29558 axlowdimlem10 29559 axlowdimlem11 29560 axlowdimlem12 29561 0oo 31421 occllem 31935 ho01i 32460 nlelchi 32693 hmopidmchi 32783 elrgspnlem1 33873 gsumind 33976 esplyfval0 34266 eulerpartlemt 35073 breprexpnat 35333 fullfunfnv 36888 fullfunfv 36889 poimirlem16 38746 poimirlem19 38749 poimirlem23 38753 poimirlem24 38754 poimirlem25 38755 poimirlem28 38758 poimirlem29 38759 poimirlem30 38760 poimirlem31 38761 poimirlem32 38762 ftc1anclem5 38807 lfl0f 40318 diophrw 43963 pwssplit4 44284 ofsubid 45500 dvsconst 45506 dvsid 45507 binomcxplemnn0 45525 binomcxplemnotnn0 45532 functermc 50848 aacllem 51219 |
| Copyright terms: Public domain | W3C validator |