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| Mirrors > Home > MPE Home > Th. List > htaOLD | Structured version Visualization version GIF version | ||
| Description: Obsolete version of hta 9923 as of 22-Jul-2026. (Contributed by NM, 11-Mar-2004.) (Revised by Mario Carneiro, 25-Jun-2015.) (Proof modification is discouraged.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| htaOLD.1 | ⊢ 𝐴 = {𝑥 ∣ (𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦)))} |
| htaOLD.2 | ⊢ 𝐵 = (℩𝑧 ∈ 𝐴 ∀𝑤 ∈ 𝐴 ¬ 𝑤𝑅𝑧) |
| Ref | Expression |
|---|---|
| htaOLD | ⊢ (𝑅 We 𝐴 → (𝜑 → [𝐵 / 𝑥]𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 19.8a 2217 | . . 3 ⊢ (𝜑 → ∃𝑥𝜑) | |
| 2 | scott0bsOLD 9906 | . . . 4 ⊢ (∃𝑥𝜑 ↔ {𝑥 ∣ (𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦)))} ≠ ∅) | |
| 3 | htaOLD.1 | . . . . 5 ⊢ 𝐴 = {𝑥 ∣ (𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦)))} | |
| 4 | 3 | neeq1i 3019 | . . . 4 ⊢ (𝐴 ≠ ∅ ↔ {𝑥 ∣ (𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦)))} ≠ ∅) |
| 5 | 2, 4 | bitr4i 281 | . . 3 ⊢ (∃𝑥𝜑 ↔ 𝐴 ≠ ∅) |
| 6 | 1, 5 | sylib 221 | . 2 ⊢ (𝜑 → 𝐴 ≠ ∅) |
| 7 | scottexsOLD 9904 | . . . . 5 ⊢ {𝑥 ∣ (𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦)))} ∈ V | |
| 8 | 3, 7 | eqeltri 2856 | . . . 4 ⊢ 𝐴 ∈ V |
| 9 | htaOLD.2 | . . . 4 ⊢ 𝐵 = (℩𝑧 ∈ 𝐴 ∀𝑤 ∈ 𝐴 ¬ 𝑤𝑅𝑧) | |
| 10 | 8, 9 | htalem 9922 | . . 3 ⊢ ((𝑅 We 𝐴 ∧ 𝐴 ≠ ∅) → 𝐵 ∈ 𝐴) |
| 11 | 10 | ex 418 | . 2 ⊢ (𝑅 We 𝐴 → (𝐴 ≠ ∅ → 𝐵 ∈ 𝐴)) |
| 12 | simpl 488 | . . . . . 6 ⊢ ((𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦))) → 𝜑) | |
| 13 | 12 | ss2abi 4014 | . . . . 5 ⊢ {𝑥 ∣ (𝜑 ∧ ∀𝑦([𝑦 / 𝑥]𝜑 → (rank‘𝑥) ⊆ (rank‘𝑦)))} ⊆ {𝑥 ∣ 𝜑} |
| 14 | 3, 13 | eqsstri 3977 | . . . 4 ⊢ 𝐴 ⊆ {𝑥 ∣ 𝜑} |
| 15 | 14 | sseli 3927 | . . 3 ⊢ (𝐵 ∈ 𝐴 → 𝐵 ∈ {𝑥 ∣ 𝜑}) |
| 16 | df-sbc 3740 | . . 3 ⊢ ([𝐵 / 𝑥]𝜑 ↔ 𝐵 ∈ {𝑥 ∣ 𝜑}) | |
| 17 | 15, 16 | sylibr 237 | . 2 ⊢ (𝐵 ∈ 𝐴 → [𝐵 / 𝑥]𝜑) |
| 18 | 6, 11, 17 | syl56 37 | 1 ⊢ (𝑅 We 𝐴 → (𝜑 → [𝐵 / 𝑥]𝜑)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∀wal 1568 = wceq 1570 ∃wex 1812 ∈ wcel 2145 {cab 2738 ≠ wne 2955 ∀wral 3076 Vcvv 3450 [wsbc 3739 ⊆ wss 3899 ∅c0 4279 class class class wbr 5103 We wwe 5607 ‘cfv 6534 ℩crio 7371 rankcrnk 9749 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7738 ax-reg 9568 ax-inf2 9624 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 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-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-iin 4954 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6300 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-riota 7372 df-ov 7418 df-om 7865 df-2nd 7989 df-frecs 8282 df-wrecs 8313 df-recs 8362 df-rdg 8401 df-r1 9750 df-rank 9751 |
| This theorem is used by: (None) |
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