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| Mirrors > Home > MPE Home > Th. List > no2inds | Structured version Visualization version GIF version | ||
| Description: Double induction on surreals. The many substitution instances are to cover all possible cases. (Contributed by Scott Fenton, 22-Aug-2024.) |
| Ref | Expression |
|---|---|
| no2inds.1 | ⊢ (𝑥 = 𝑧 → (𝜑 ↔ 𝜓)) |
| no2inds.2 | ⊢ (𝑦 = 𝑤 → (𝜓 ↔ 𝜒)) |
| no2inds.3 | ⊢ (𝑥 = 𝑧 → (𝜃 ↔ 𝜒)) |
| no2inds.4 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) |
| no2inds.5 | ⊢ (𝑦 = 𝐵 → (𝜏 ↔ 𝜂)) |
| no2inds.i | ⊢ ((𝑥 ∈ No ∧ 𝑦 ∈ No ) → ((∀𝑧 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))∀𝑤 ∈ (( L ‘𝑦) ∪ ( R ‘𝑦))𝜒 ∧ ∀𝑧 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))𝜓 ∧ ∀𝑤 ∈ (( L ‘𝑦) ∪ ( R ‘𝑦))𝜃) → 𝜑)) |
| Ref | Expression |
|---|---|
| no2inds | ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → 𝜂) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2760 | . 2 ⊢ {〈𝑎, 𝑏〉 ∣ 𝑎 ∈ (( L ‘𝑏) ∪ ( R ‘𝑏))} = {〈𝑎, 𝑏〉 ∣ 𝑎 ∈ (( L ‘𝑏) ∪ ( R ‘𝑏))} | |
| 2 | no2inds.1 | . 2 ⊢ (𝑥 = 𝑧 → (𝜑 ↔ 𝜓)) | |
| 3 | no2inds.2 | . 2 ⊢ (𝑦 = 𝑤 → (𝜓 ↔ 𝜒)) | |
| 4 | no2inds.3 | . 2 ⊢ (𝑥 = 𝑧 → (𝜃 ↔ 𝜒)) | |
| 5 | no2inds.4 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜏)) | |
| 6 | no2inds.5 | . 2 ⊢ (𝑦 = 𝐵 → (𝜏 ↔ 𝜂)) | |
| 7 | no2inds.i | . 2 ⊢ ((𝑥 ∈ No ∧ 𝑦 ∈ No ) → ((∀𝑧 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))∀𝑤 ∈ (( L ‘𝑦) ∪ ( R ‘𝑦))𝜒 ∧ ∀𝑧 ∈ (( L ‘𝑥) ∪ ( R ‘𝑥))𝜓 ∧ ∀𝑤 ∈ (( L ‘𝑦) ∪ ( R ‘𝑦))𝜃) → 𝜑)) | |
| 8 | 1, 2, 3, 4, 5, 6, 7 | no2indlesm 28220 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → 𝜂) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∪ cun 3897 {copab 5167 ‘cfv 6533 No csur 27877 L cleft 28091 R cright 28092 |
| 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 7737 |
| 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-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 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-se 5609 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 6299 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-1o 8456 df-2o 8457 df-no 27880 df-lts 27881 df-bday 27882 df-slts 28024 df-cuts 28026 df-made 28093 df-old 28094 df-left 28096 df-right 28097 |
| This theorem is used by: addscom 28232 addbday 28284 mulscom 28405 |
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