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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 39096. (Contributed by Peter Mazsa, 5-Sep-2021.) |
| Ref | Expression |
|---|---|
| dfdisjALTV4 | ⊢ ( Disj 𝑅 ↔ (∀𝑥∃*𝑢 𝑢𝑅𝑥 ∧ Rel 𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfdisjALTV2 39120 | . 2 ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) | |
| 2 | cosscnvssid4 38888 | . . 3 ⊢ ( ≀ ◡𝑅 ⊆ I ↔ ∀𝑥∃*𝑢 𝑢𝑅𝑥) | |
| 3 | 2 | anbi1i 625 | . 2 ⊢ (( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅) ↔ (∀𝑥∃*𝑢 𝑢𝑅𝑥 ∧ Rel 𝑅)) |
| 4 | 1, 3 | bitri 275 | 1 ⊢ ( Disj 𝑅 ↔ (∀𝑥∃*𝑢 𝑢𝑅𝑥 ∧ Rel 𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 ∀wal 1540 ∃*wmo 2537 ⊆ wss 3889 class class class wbr 5085 I cid 5525 ◡ccnv 5630 Rel wrel 5636 ≀ ccoss 38504 Disj wdisjALTV 38540 |
| 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 2708 ax-sep 5231 ax-pr 5375 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-coss 38822 df-cnvrefrel 38928 df-disjALTV 39111 |
| This theorem is referenced by: dfeldisj4 39133 disjres 39165 disjALTV0 39175 disjim 39205 |
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