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Theorem no2inds 28201
Description: Double induction on surreals. The many substitution instances are to cover all possible cases. (Contributed by Scott Fenton, 22-Aug-2024.)
Hypotheses
Ref Expression
no2inds.1 (𝑥 = 𝑧 → (𝜑𝜓))
no2inds.2 (𝑦 = 𝑤 → (𝜓𝜒))
no2inds.3 (𝑥 = 𝑧 → (𝜃𝜒))
no2inds.4 (𝑥 = 𝐴 → (𝜑𝜏))
no2inds.5 (𝑦 = 𝐵 → (𝜏𝜂))
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))
Assertion
Ref Expression
no2inds ((𝐴 No 𝐵 No ) → 𝜂)
Distinct variable groups:   𝑥,𝐴,𝑦   𝑦,𝐵   𝜒,𝑦   𝜂,𝑦   𝜑,𝑧   𝜓,𝑤,𝑥   𝜏,𝑥   𝜃,𝑧   𝑥,𝑤,𝑦,𝑧
Allowed substitution hints:   𝜑(𝑥, 𝑦, 𝑤)   𝜓(𝑦, 𝑧)   𝜒(𝑥, 𝑧, 𝑤)   𝜃(𝑥, 𝑦, 𝑤)   𝜏(𝑦, 𝑧, 𝑤)   𝜂(𝑥, 𝑧, 𝑤)   𝐴(𝑧, 𝑤)   𝐵(𝑥, 𝑧, 𝑤)

Proof of Theorem no2inds
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2765 . 2 {⟨𝑎, 𝑏⟩ ∣ 𝑎 ∈ (( L ‘𝑏) ∪ ( R ‘𝑏))} = {⟨𝑎, 𝑏⟩ ∣ 𝑎 ∈ (( L ‘𝑏) ∪ ( R ‘𝑏))}
2 no2inds.1 . 2 (𝑥 = 𝑧 → (𝜑𝜓))
3 no2inds.2 . 2 (𝑦 = 𝑤 → (𝜓𝜒))
4 no2inds.3 . 2 (𝑥 = 𝑧 → (𝜃𝜒))
5 no2inds.4 . 2 (𝑥 = 𝐴 → (𝜑𝜏))
6 no2inds.5 . 2 (𝑦 = 𝐵 → (𝜏𝜂))
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))
81, 2, 3, 4, 5, 6, 7no2indlesm 28200 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 2146  wral 3081  cun 3904  {copab 5175  cfv 6540   No csur 27857   L cleft 28071   R cright 28072
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 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2737  ax-rep 5240  ax-sep 5259  ax-nul 5271  ax-pow 5338  ax-pr 5406  ax-un 7742
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 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3082  df-rex 3092  df-rmo 3371  df-reu 3372  df-rab 3419  df-v 3459  df-sbc 3747  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-pss 3926  df-nul 4287  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-tp 4596  df-op 4598  df-uni 4875  df-int 4915  df-iun 4960  df-br 5112  df-opab 5176  df-mpt 5195  df-tr 5221  df-id 5558  df-eprel 5563  df-po 5571  df-so 5572  df-fr 5616  df-se 5617  df-we 5618  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-pred 6306  df-ord 6367  df-on 6368  df-suc 6370  df-iota 6496  df-fun 6542  df-fn 6543  df-f 6544  df-f1 6545  df-fo 6546  df-f1o 6547  df-fv 6548  df-riota 7376  df-ov 7422  df-oprab 7423  df-mpo 7424  df-1st 7992  df-2nd 7993  df-frecs 8284  df-wrecs 8315  df-recs 8364  df-1o 8459  df-2o 8460  df-no 27860  df-lts 27861  df-bday 27862  df-slts 28004  df-cuts 28006  df-made 28073  df-old 28074  df-left 28076  df-right 28077
This theorem is used by:  addscom  28212  addbday  28264  mulscom  28385
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