| 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 5693 | . . 3 ⊢ (𝐴 × {𝐵}) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 3 | 1, 2 | fnmpti 6642 | . 2 ⊢ (𝐴 × {𝐵}) Fn 𝐴 |
| 4 | rnxpss 6137 | . 2 ⊢ ran (𝐴 × {𝐵}) ⊆ {𝐵} | |
| 5 | df-f 6503 | . 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 3430 ⊆ wss 3890 {csn 4568 × cxp 5629 ran crn 5632 Fn wfn 6494 ⟶wf 6495 |
| 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 2185 ax-ext 2709 ax-sep 5232 ax-pr 5376 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-fun 6501 df-fn 6502 df-f 6503 |
| This theorem is referenced by: fconstg 6728 fodomr 9066 fodomfir 9238 ofsubeq0 12156 ser0f 14017 hashgval 14295 hashinf 14297 hashfxnn0 14299 prodf1f 15857 pwssplit1 21054 psrbag0 22040 xkofvcn 23649 rrx0el 25365 ibl0 25754 dvcmul 25911 dvcmulf 25912 dvexp 25920 elqaalem3 26287 basellem7 27050 basellem9 27052 noetasuplem4 27700 axlowdimlem8 29018 axlowdimlem9 29019 axlowdimlem10 29020 axlowdimlem11 29021 axlowdimlem12 29022 0oo 30860 occllem 31374 ho01i 31899 nlelchi 32132 hmopidmchi 32222 elrgspnlem1 33303 gsumind 33405 esplyfval0 33708 eulerpartlemt 34515 plymul02 34690 breprexpnat 34778 fullfunfnv 36128 fullfunfv 36129 poimirlem16 37957 poimirlem19 37960 poimirlem23 37964 poimirlem24 37965 poimirlem25 37966 poimirlem28 37969 poimirlem29 37970 poimirlem30 37971 poimirlem31 37972 poimirlem32 37973 ftc1anclem5 38018 lfl0f 39515 diophrw 43191 pwssplit4 43517 ofsubid 44751 dvsconst 44757 dvsid 44758 binomcxplemnn0 44776 binomcxplemnotnn0 44783 functermc 49977 aacllem 50270 |
| Copyright terms: Public domain | W3C validator |