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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 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 4294 | . . . . . 6 ⊢ (𝐴 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ 𝐴) | |
| 3 | 1, 2 | sylibr 234 | . . . . 5 ⊢ (𝜑 → 𝐴 ≠ ∅) |
| 4 | 3 | neneqd 2938 | . . . 4 ⊢ (𝜑 → ¬ 𝐴 = ∅) |
| 5 | scott0 9801 | . . . . 5 ⊢ (𝐴 = ∅ ↔ {𝑦 ∈ 𝐴 ∣ ∀𝑧 ∈ 𝐴 (rank‘𝑦) ⊆ (rank‘𝑧)} = ∅) | |
| 6 | df-scott 44681 | . . . . . 6 ⊢ Scott 𝐴 = {𝑦 ∈ 𝐴 ∣ ∀𝑧 ∈ 𝐴 (rank‘𝑦) ⊆ (rank‘𝑧)} | |
| 7 | 6 | eqeq1i 2742 | . . . . 5 ⊢ (Scott 𝐴 = ∅ ↔ {𝑦 ∈ 𝐴 ∣ ∀𝑧 ∈ 𝐴 (rank‘𝑦) ⊆ (rank‘𝑧)} = ∅) |
| 8 | 5, 7 | bitr4i 278 | . . . 4 ⊢ (𝐴 = ∅ ↔ Scott 𝐴 = ∅) |
| 9 | 4, 8 | sylnib 328 | . . 3 ⊢ (𝜑 → ¬ Scott 𝐴 = ∅) |
| 10 | 9 | neqned 2940 | . 2 ⊢ (𝜑 → Scott 𝐴 ≠ ∅) |
| 11 | n0 4294 | . 2 ⊢ (Scott 𝐴 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ Scott 𝐴) | |
| 12 | 10, 11 | sylib 218 | 1 ⊢ (𝜑 → ∃𝑥 𝑥 ∈ Scott 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∃wex 1781 ∈ wcel 2114 ≠ wne 2933 ∀wral 3052 {crab 3390 ⊆ wss 3890 ∅c0 4274 ‘cfv 6492 rankcrnk 9678 Scott cscott 44680 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-iin 4937 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7363 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-r1 9679 df-rank 9680 df-scott 44681 |
| This theorem is referenced by: cpcolld 44703 |
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