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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 2769 | . 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 28113 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → 𝜂) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∧ w3a 1101 = wceq 1567 ∈ wcel 2149 ∀wral 3085 ∪ cun 3911 {copab 5177 ‘cfv 6537 No csur 27770 L cleft 27984 R cright 27985 |
| 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-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 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-rmo 3376 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-tp 4599 df-op 4601 df-uni 4877 df-int 4917 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-se 5616 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-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-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-1o 8453 df-2o 8454 df-no 27773 df-lts 27774 df-bday 27775 df-slts 27917 df-cuts 27919 df-made 27986 df-old 27987 df-left 27989 df-right 27990 |
| This theorem is referenced by: addscom 28125 addbday 28177 mulscom 28298 |
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