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| Mirrors > Home > MPE Home > Th. List > scotteld | Structured version Visualization version GIF version | ||
| Description: The Scott operation sends inhabited classes to inhabited sets. (Contributed by Rohan Ridenour, 11-Aug-2023.) |
| Ref | Expression |
|---|---|
| scotteld.1 | ⊢ (𝜑 → ∃𝑥 𝑥 ∈ 𝐴) |
| Ref | Expression |
|---|---|
| scotteld | ⊢ (𝜑 → ∃𝑥 𝑥 ∈ Scott 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | scotteld.1 | . . . . . 6 ⊢ (𝜑 → ∃𝑥 𝑥 ∈ 𝐴) | |
| 2 | n0 4299 | . . . . . 6 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ 𝐴) | |
| 3 | 1, 2 | sylibr 237 | . . . . 5 ⊢ (𝜑 → 𝐴 ≠ ∅) |
| 4 | 3 | neneqd 2960 | . . . 4 ⊢ (𝜑 → ¬ 𝐴 = ∅) |
| 5 | scott0b 9942 | . . . 4 ⊢ (𝐴 = ∅ ↔ Scott 𝐴 = ∅) | |
| 6 | 4, 5 | sylnib 331 | . . 3 ⊢ (𝜑 → ¬ Scott 𝐴 = ∅) |
| 7 | 6 | neqned 2962 | . 2 ⊢ (𝜑 → Scott 𝐴 ≠ ∅) |
| 8 | n0 4299 | . 2 ⊢ (Scott 𝐴 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ Scott 𝐴) | |
| 9 | 7, 8 | sylib 221 | 1 ⊢ (𝜑 → ∃𝑥 𝑥 ∈ Scott 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∃wex 1811 ∈ wcel 2144 ≠ wne 2955 ∅c0 4277 Scott cscott 9933 |
| 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-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7753 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-iin 4953 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-ov 7425 df-om 7880 df-2nd 8004 df-frecs 8304 df-wrecs 8335 df-recs 8384 df-rdg 8423 df-r1 9773 df-rank 9774 df-scott 9934 |
| This theorem is used by: cpcolld 45349 |
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