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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dffunsALTV4 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the class of functions. For the 𝑋 axis and the 𝑌 axis you can convert the right side to {𝑓 ∈ Rels ∣ ∀𝑥1∃*𝑦1𝑥1𝑓𝑦1}. (Contributed by Peter Mazsa, 31-Aug-2021.) |
| Ref | Expression |
|---|---|
| dffunsALTV4 | ⊢ FunsALTV = {𝑓 ∈ Rels ∣ ∀𝑢∃*𝑥 𝑢𝑓𝑥} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dffunsALTV 38964 | . 2 ⊢ FunsALTV = {𝑓 ∈ Rels ∣ ≀ 𝑓 ∈ CnvRefRels } | |
| 2 | cosselcnvrefrels4 38815 | . . 3 ⊢ ( ≀ 𝑓 ∈ CnvRefRels ↔ (∀𝑢∃*𝑥 𝑢𝑓𝑥 ∧ ≀ 𝑓 ∈ Rels )) | |
| 3 | cosselrels 38770 | . . . 4 ⊢ (𝑓 ∈ Rels → ≀ 𝑓 ∈ Rels ) | |
| 4 | 3 | biantrud 531 | . . 3 ⊢ (𝑓 ∈ Rels → (∀𝑢∃*𝑥 𝑢𝑓𝑥 ↔ (∀𝑢∃*𝑥 𝑢𝑓𝑥 ∧ ≀ 𝑓 ∈ Rels ))) |
| 5 | 2, 4 | bitr4id 290 | . 2 ⊢ (𝑓 ∈ Rels → ( ≀ 𝑓 ∈ CnvRefRels ↔ ∀𝑢∃*𝑥 𝑢𝑓𝑥)) |
| 6 | 1, 5 | rabimbieq 38452 | 1 ⊢ FunsALTV = {𝑓 ∈ Rels ∣ ∀𝑢∃*𝑥 𝑢𝑓𝑥} |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∀wal 1539 = wceq 1541 ∈ wcel 2113 ∃*wmo 2537 {crab 3399 class class class wbr 5098 ≀ ccoss 38386 Rels crels 38388 CnvRefRels ccnvrefrels 38394 FunsALTV cfunsALTV 38416 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-rels 38638 df-coss 38696 df-ssr 38773 df-cnvrefs 38800 df-cnvrefrels 38801 df-funss 38961 df-funsALTV 38962 |
| This theorem is referenced by: dffunsALTV5 38968 |
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