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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dfeldisj2 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the disjoint elementhood predicate. (Contributed by Peter Mazsa, 19-Sep-2021.) |
| Ref | Expression |
|---|---|
| dfeldisj2 | ⊢ ( ElDisj 𝐴 ↔ ≀ ◡(◡ E ↾ 𝐴) ⊆ I ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-eldisj 39473 | . 2 ⊢ ( ElDisj 𝐴 ↔ Disj (◡ E ↾ 𝐴)) | |
| 2 | relres 6007 | . . 3 ⊢ Rel (◡ E ↾ 𝐴) | |
| 3 | dfdisjALTV2 39480 | . . 3 ⊢ ( Disj (◡ E ↾ 𝐴) ↔ ( ≀ ◡(◡ E ↾ 𝐴) ⊆ I ∧ Rel (◡ E ↾ 𝐴))) | |
| 4 | 2, 3 | mpbiran2 723 | . 2 ⊢ ( Disj (◡ E ↾ 𝐴) ↔ ≀ ◡(◡ E ↾ 𝐴) ⊆ I ) |
| 5 | 1, 4 | bitri 278 | 1 ⊢ ( ElDisj 𝐴 ↔ ≀ ◡(◡ E ↾ 𝐴) ⊆ I ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ⊆ wss 3908 I cid 5558 E cep 5563 ◡ccnv 5663 ↾ cres 5666 Rel wrel 5669 ≀ ccoss 38864 Disj wdisjALTV 38900 ElDisj weldisj 38902 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-11 2195 ax-ext 2738 ax-sep 5260 ax-pr 5407 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2745 df-cleq 2758 df-clel 2841 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4491 df-sn 4593 df-pr 4595 df-op 4599 df-br 5113 df-opab 5177 df-id 5559 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-coss 39182 df-cnvrefrel 39288 df-disjALTV 39471 df-eldisj 39473 |
| This theorem is used by: (None) |
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