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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 35957. (Contributed by Peter Mazsa, 27-Jul-2021.) |
Ref | Expression |
---|---|
dfdisjALTV2 | ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-disjALTV 35974 | . 2 ⊢ ( Disj 𝑅 ↔ ( CnvRefRel ≀ ◡𝑅 ∧ Rel 𝑅)) | |
2 | cnvrefrelcoss2 35809 | . . 3 ⊢ ( CnvRefRel ≀ ◡𝑅 ↔ ≀ ◡𝑅 ⊆ I ) | |
3 | 2 | anbi1i 625 | . 2 ⊢ (( CnvRefRel ≀ ◡𝑅 ∧ Rel 𝑅) ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) |
4 | 1, 3 | bitri 277 | 1 ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∧ wa 398 ⊆ wss 3933 I cid 5456 ◡ccnv 5551 Rel wrel 5557 ≀ ccoss 35489 CnvRefRel wcnvrefrel 35498 Disj wdisjALTV 35523 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2792 ax-sep 5200 ax-nul 5207 ax-pr 5327 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1084 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2799 df-cleq 2813 df-clel 2892 df-nfc 2962 df-ral 3142 df-rex 3143 df-rab 3146 df-v 3495 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4465 df-sn 4565 df-pr 4567 df-op 4571 df-br 5064 df-opab 5126 df-id 5457 df-xp 5558 df-rel 5559 df-cnv 5560 df-co 5561 df-dm 5562 df-rn 5563 df-res 5564 df-coss 35695 df-cnvrefrel 35801 df-disjALTV 35974 |
This theorem is referenced by: dfdisjALTV3 35984 dfdisjALTV4 35985 dfdisjALTV5 35986 dfeldisj2 35987 disjxrn 36013 disjorimxrn 36014 disjALTVid 36021 |
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