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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dfdisjALTV4 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the disjoint relation predicate, cf. dffunALTV4 39151. (Contributed by Peter Mazsa, 5-Sep-2021.) |
| Ref | Expression |
|---|---|
| dfdisjALTV4 | ⊢ ( Disj 𝑅 ↔ (∀𝑥∃*𝑢 𝑢𝑅𝑥 ∧ Rel 𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfdisjALTV2 39175 | . 2 ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) | |
| 2 | cosscnvssid4 38943 | . . 3 ⊢ ( ≀ ◡𝑅 ⊆ I ↔ ∀𝑥∃*𝑢 𝑢𝑅𝑥) | |
| 3 | 2 | anbi1i 630 | . 2 ⊢ (( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅) ↔ (∀𝑥∃*𝑢 𝑢𝑅𝑥 ∧ Rel 𝑅)) |
| 4 | 1, 3 | bitri 276 | 1 ⊢ ( Disj 𝑅 ↔ (∀𝑥∃*𝑢 𝑢𝑅𝑥 ∧ Rel 𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 207 ∧ wa 396 ∀wal 1545 ∃*wmo 2541 ⊆ wss 3883 class class class wbr 5073 I cid 5513 ◡ccnv 5618 Rel wrel 5624 ≀ ccoss 38559 Disj wdisjALTV 38595 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5219 ax-pr 5363 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4263 df-if 4456 df-sn 4557 df-pr 4559 df-op 4563 df-br 5074 df-opab 5136 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-coss 38877 df-cnvrefrel 38983 df-disjALTV 39166 |
| This theorem is referenced by: dfeldisj4 39188 disjres 39220 disjALTV0 39230 disjim 39260 |
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