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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dfdisjALTV2 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the disjoint relation predicate, cf. dffunALTV2 39706. (Contributed by Peter Mazsa, 27-Jul-2021.) |
| Ref | Expression |
|---|---|
| dfdisjALTV2 | ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-disjALTV 39723 | . 2 ⊢ ( Disj 𝑅 ↔ ( CnvRefRel ≀ ◡𝑅 ∧ Rel 𝑅)) | |
| 2 | cnvrefrelcoss2 39550 | . . 3 ⊢ ( CnvRefRel ≀ ◡𝑅 ↔ ≀ ◡𝑅 ⊆ I ) | |
| 3 | 2 | anbi1i 636 | . 2 ⊢ (( CnvRefRel ≀ ◡𝑅 ∧ Rel 𝑅) ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) |
| 4 | 1, 3 | bitri 278 | 1 ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 ⊆ wss 3895 I cid 5544 ◡ccnv 5649 Rel wrel 5655 ≀ ccoss 39116 CnvRefRel wcnvrefrel 39125 Disj wdisjALTV 39152 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-11 2193 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-coss 39434 df-cnvrefrel 39540 df-disjALTV 39723 |
| This theorem is used by: dfdisjALTV3 39733 dfdisjALTV4 39734 dfdisjALTV5 39735 dfeldisj2 39743 disjxrn 39779 disjorimxrn 39781 disjALTVid 39788 |
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