| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > fnconstg | GIF version | ||
| Description: A cross 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 5524 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}):𝐴⟶{𝐵}) | |
| 2 | ffn 5473 | . 2 ⊢ ((𝐴 × {𝐵}):𝐴⟶{𝐵} → (𝐴 × {𝐵}) Fn 𝐴) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴 × {𝐵}) Fn 𝐴) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2200 {csn 3666 × cxp 4717 Fn wfn 5313 ⟶wf 5314 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-fun 5320 df-fn 5321 df-f 5322 |
| This theorem is referenced by: fconst2g 5858 ofc1g 6246 ofc2g 6247 caofid0l 6251 caofid0r 6252 caofid1 6253 caofid2 6254 pwsplusgval 13336 pwsmulrval 13337 dvidlemap 15373 dvidrelem 15374 dvidsslem 15375 nninfsellemeqinf 16412 |
| Copyright terms: Public domain | W3C validator |