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Mathbox for Giovanni Mascellani |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > scottn0f | Structured version Visualization version GIF version |
Description: A version of scott0f 38168 with inequalities instead of equalities. (Contributed by Giovanni Mascellani, 19-Aug-2018.) |
Ref | Expression |
---|---|
scottn0f.1 | ⊢ Ⅎ𝑦𝐴 |
scottn0f.2 | ⊢ Ⅎ𝑥𝐴 |
Ref | Expression |
---|---|
scottn0f | ⊢ (𝐴 ≠ ∅ ↔ {𝑥 ∈ 𝐴 ∣ ∀𝑦 ∈ 𝐴 (rank‘𝑥) ⊆ (rank‘𝑦)} ≠ ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | scottn0f.1 | . . 3 ⊢ Ⅎ𝑦𝐴 | |
2 | scottn0f.2 | . . 3 ⊢ Ⅎ𝑥𝐴 | |
3 | 1, 2 | scott0f 38168 | . 2 ⊢ (𝐴 = ∅ ↔ {𝑥 ∈ 𝐴 ∣ ∀𝑦 ∈ 𝐴 (rank‘𝑥) ⊆ (rank‘𝑦)} = ∅) |
4 | 3 | necon3bii 2992 | 1 ⊢ (𝐴 ≠ ∅ ↔ {𝑥 ∈ 𝐴 ∣ ∀𝑦 ∈ 𝐴 (rank‘𝑥) ⊆ (rank‘𝑦)} ≠ ∅) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 206 Ⅎwnfc 2889 ≠ wne 2939 ∀wral 3060 {crab 3434 ⊆ wss 3964 ∅c0 4340 ‘cfv 6566 rankcrnk 9807 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2707 ax-sep 5303 ax-nul 5313 ax-pow 5372 ax-pr 5439 ax-un 7758 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1541 df-fal 1551 df-ex 1778 df-nf 1782 df-sb 2064 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2728 df-clel 2815 df-nfc 2891 df-ne 2940 df-ral 3061 df-rex 3070 df-reu 3380 df-rab 3435 df-v 3481 df-sbc 3793 df-csb 3910 df-dif 3967 df-un 3969 df-in 3971 df-ss 3981 df-pss 3984 df-nul 4341 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-op 4639 df-uni 4914 df-int 4953 df-iun 4999 df-iin 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5584 df-eprel 5590 df-po 5598 df-so 5599 df-fr 5642 df-we 5644 df-xp 5696 df-rel 5697 df-cnv 5698 df-co 5699 df-dm 5700 df-rn 5701 df-res 5702 df-ima 5703 df-pred 6326 df-ord 6392 df-on 6393 df-lim 6394 df-suc 6395 df-iota 6519 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-ov 7438 df-om 7892 df-2nd 8020 df-frecs 8311 df-wrecs 8342 df-recs 8416 df-rdg 8455 df-r1 9808 df-rank 9809 |
This theorem is referenced by: (None) |
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