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| Mirrors > Home > MPE Home > Th. List > noseqinds | Structured version Visualization version GIF version | ||
| Description: Induction schema for surreal sequences. (Contributed by Scott Fenton, 18-Apr-2025.) |
| Ref | Expression |
|---|---|
| noseq.1 | ⊢ (𝜑 → 𝑍 = (rec((𝑥 ∈ V ↦ (𝑥 +s 1s )), 𝐴) “ ω)) |
| noseq.2 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| noseqinds.3 | ⊢ (𝑦 = 𝐴 → (𝜓 ↔ 𝜒)) |
| noseqinds.4 | ⊢ (𝑦 = 𝑧 → (𝜓 ↔ 𝜃)) |
| noseqinds.5 | ⊢ (𝑦 = (𝑧 +s 1s ) → (𝜓 ↔ 𝜏)) |
| noseqinds.6 | ⊢ (𝑦 = 𝐵 → (𝜓 ↔ 𝜂)) |
| noseqinds.7 | ⊢ (𝜑 → 𝜒) |
| noseqinds.8 | ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → (𝜃 → 𝜏)) |
| Ref | Expression |
|---|---|
| noseqinds | ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑍) → 𝜂) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | noseq.1 | . . . . 5 ⊢ (𝜑 → 𝑍 = (rec((𝑥 ∈ V ↦ (𝑥 +s 1s )), 𝐴) “ ω)) | |
| 2 | noseq.2 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 3 | noseqinds.3 | . . . . . 6 ⊢ (𝑦 = 𝐴 → (𝜓 ↔ 𝜒)) | |
| 4 | 1, 2 | noseq0 28448 | . . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝑍) |
| 5 | noseqinds.7 | . . . . . 6 ⊢ (𝜑 → 𝜒) | |
| 6 | 3, 4, 5 | elrabd 3661 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ {𝑦 ∈ 𝑍 ∣ 𝜓}) |
| 7 | noseqinds.8 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → (𝜃 → 𝜏)) | |
| 8 | 1 | adantr 485 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → 𝑍 = (rec((𝑥 ∈ V ↦ (𝑥 +s 1s )), 𝐴) “ ω)) |
| 9 | 2 | adantr 485 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → 𝐴 ∈ No ) |
| 10 | simpr 489 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → 𝑧 ∈ 𝑍) | |
| 11 | 8, 9, 10 | noseqp1 28449 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → (𝑧 +s 1s ) ∈ 𝑍) |
| 12 | 7, 11 | jctild 534 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑧 ∈ 𝑍) → (𝜃 → ((𝑧 +s 1s ) ∈ 𝑍 ∧ 𝜏))) |
| 13 | 12 | expimpd 458 | . . . . . . 7 ⊢ (𝜑 → ((𝑧 ∈ 𝑍 ∧ 𝜃) → ((𝑧 +s 1s ) ∈ 𝑍 ∧ 𝜏))) |
| 14 | noseqinds.4 | . . . . . . . 8 ⊢ (𝑦 = 𝑧 → (𝜓 ↔ 𝜃)) | |
| 15 | 14 | elrab 3659 | . . . . . . 7 ⊢ (𝑧 ∈ {𝑦 ∈ 𝑍 ∣ 𝜓} ↔ (𝑧 ∈ 𝑍 ∧ 𝜃)) |
| 16 | noseqinds.5 | . . . . . . . 8 ⊢ (𝑦 = (𝑧 +s 1s ) → (𝜓 ↔ 𝜏)) | |
| 17 | 16 | elrab 3659 | . . . . . . 7 ⊢ ((𝑧 +s 1s ) ∈ {𝑦 ∈ 𝑍 ∣ 𝜓} ↔ ((𝑧 +s 1s ) ∈ 𝑍 ∧ 𝜏)) |
| 18 | 13, 15, 17 | 3imtr4g 299 | . . . . . 6 ⊢ (𝜑 → (𝑧 ∈ {𝑦 ∈ 𝑍 ∣ 𝜓} → (𝑧 +s 1s ) ∈ {𝑦 ∈ 𝑍 ∣ 𝜓})) |
| 19 | 18 | imp 411 | . . . . 5 ⊢ ((𝜑 ∧ 𝑧 ∈ {𝑦 ∈ 𝑍 ∣ 𝜓}) → (𝑧 +s 1s ) ∈ {𝑦 ∈ 𝑍 ∣ 𝜓}) |
| 20 | 1, 2, 6, 19 | noseqind 28450 | . . . 4 ⊢ (𝜑 → 𝑍 ⊆ {𝑦 ∈ 𝑍 ∣ 𝜓}) |
| 21 | 20 | sselda 3945 | . . 3 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑍) → 𝐵 ∈ {𝑦 ∈ 𝑍 ∣ 𝜓}) |
| 22 | noseqinds.6 | . . . 4 ⊢ (𝑦 = 𝐵 → (𝜓 ↔ 𝜂)) | |
| 23 | 22 | elrab 3659 | . . 3 ⊢ (𝐵 ∈ {𝑦 ∈ 𝑍 ∣ 𝜓} ↔ (𝐵 ∈ 𝑍 ∧ 𝜂)) |
| 24 | 21, 23 | sylib 221 | . 2 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑍) → (𝐵 ∈ 𝑍 ∧ 𝜂)) |
| 25 | 24 | simprd 500 | 1 ⊢ ((𝜑 ∧ 𝐵 ∈ 𝑍) → 𝜂) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 {crab 3423 Vcvv 3463 ↦ cmpt 5196 “ cima 5665 (class class class)co 7411 ωcom 7861 reccrdg 8395 No csur 27769 1s c1s 27964 +s cadds 28117 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7414 df-om 7862 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 |
| This theorem is referenced by: n0sind 28491 nnsind 28531 |
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