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Theorem relexpind 14423
Description: Principle of transitive induction, finite version. The first three hypotheses give various existences, the next three give necessary substitutions and the last two are the basis and the induction hypothesis. (Contributed by Drahflow, 12-Nov-2015.) (Revised by RP, 30-May-2020.)
Hypotheses
Ref Expression
relexpind.1 (𝜂 → Rel 𝑅)
relexpind.2 (𝜂𝑅 ∈ V)
relexpind.3 (𝜂𝑆 ∈ V)
relexpind.4 (𝜂𝑋 ∈ V)
relexpind.5 (𝑖 = 𝑆 → (𝜑𝜒))
relexpind.6 (𝑖 = 𝑥 → (𝜑𝜓))
relexpind.7 (𝑖 = 𝑗 → (𝜑𝜃))
relexpind.8 (𝑥 = 𝑋 → (𝜓𝜏))
relexpind.9 (𝜂𝜒)
relexpind.10 (𝜂 → (𝑗𝑅𝑥 → (𝜃𝜓)))
Assertion
Ref Expression
relexpind (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏)))
Distinct variable groups:   𝑖,𝑗,𝑥,𝑅   𝑆,𝑖,𝑗,𝑥   𝑥,𝑋   𝑥,𝑛   𝜑,𝑗,𝑥   𝜓,𝑖,𝑗   𝜒,𝑖   𝜃,𝑖   𝜏,𝑥   𝜂,𝑖,𝑗,𝑥
Allowed substitution hints:   𝜑(𝑖,𝑛)   𝜓(𝑥,𝑛)   𝜒(𝑥,𝑗,𝑛)   𝜃(𝑥,𝑗,𝑛)   𝜏(𝑖,𝑗,𝑛)   𝜂(𝑛)   𝑅(𝑛)   𝑆(𝑛)   𝑋(𝑖,𝑗,𝑛)

Proof of Theorem relexpind
StepHypRef Expression
1 relexpind.4 . 2 (𝜂𝑋 ∈ V)
2 relexpind.8 . . . 4 (𝑥 = 𝑋 → (𝜓𝜏))
3 breq2 5070 . . . . . . . 8 (𝑥 = 𝑋 → (𝑆(𝑅𝑟𝑛)𝑥𝑆(𝑅𝑟𝑛)𝑋))
43imbi1d 344 . . . . . . 7 (𝑥 = 𝑋 → ((𝑆(𝑅𝑟𝑛)𝑥𝜏) ↔ (𝑆(𝑅𝑟𝑛)𝑋𝜏)))
54imbi2d 343 . . . . . 6 (𝑥 = 𝑋 → ((𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜏)) ↔ (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏))))
65imbi2d 343 . . . . 5 (𝑥 = 𝑋 → ((𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜏))) ↔ (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏)))))
7 imbi2 351 . . . . . . . 8 ((𝜓𝜏) → ((𝑆(𝑅𝑟𝑛)𝑥𝜓) ↔ (𝑆(𝑅𝑟𝑛)𝑥𝜏)))
87imbi2d 343 . . . . . . 7 ((𝜓𝜏) → ((𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜓)) ↔ (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜏))))
98imbi2d 343 . . . . . 6 ((𝜓𝜏) → ((𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜓))) ↔ (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜏)))))
109bibi1d 346 . . . . 5 ((𝜓𝜏) → (((𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜓))) ↔ (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏)))) ↔ ((𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜏))) ↔ (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏))))))
116, 10syl5ibr 248 . . . 4 ((𝜓𝜏) → (𝑥 = 𝑋 → ((𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜓))) ↔ (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏))))))
122, 11mpcom 38 . . 3 (𝑥 = 𝑋 → ((𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜓))) ↔ (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏)))))
13 relexpind.1 . . . 4 (𝜂 → Rel 𝑅)
14 relexpind.2 . . . 4 (𝜂𝑅 ∈ V)
15 relexpind.3 . . . 4 (𝜂𝑆 ∈ V)
16 relexpind.5 . . . 4 (𝑖 = 𝑆 → (𝜑𝜒))
17 relexpind.6 . . . 4 (𝑖 = 𝑥 → (𝜑𝜓))
18 relexpind.7 . . . 4 (𝑖 = 𝑗 → (𝜑𝜃))
19 relexpind.9 . . . 4 (𝜂𝜒)
20 relexpind.10 . . . 4 (𝜂 → (𝑗𝑅𝑥 → (𝜃𝜓)))
2113, 14, 15, 16, 17, 18, 19, 20relexpindlem 14422 . . 3 (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑥𝜓)))
2212, 21vtoclg 3567 . 2 (𝑋 ∈ V → (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏))))
231, 22mpcom 38 1 (𝜂 → (𝑛 ∈ ℕ0 → (𝑆(𝑅𝑟𝑛)𝑋𝜏)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 208   = wceq 1537  wcel 2114  Vcvv 3494   class class class wbr 5066  Rel wrel 5560  (class class class)co 7156  0cn0 11898  𝑟crelexp 14379
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pow 5266  ax-pr 5330  ax-un 7461  ax-cnex 10593  ax-resscn 10594  ax-1cn 10595  ax-icn 10596  ax-addcl 10597  ax-addrcl 10598  ax-mulcl 10599  ax-mulrcl 10600  ax-mulcom 10601  ax-addass 10602  ax-mulass 10603  ax-distr 10604  ax-i2m1 10605  ax-1ne0 10606  ax-1rid 10607  ax-rnegex 10608  ax-rrecex 10609  ax-cnre 10610  ax-pre-lttri 10611  ax-pre-lttrn 10612  ax-pre-ltadd 10613  ax-pre-mulgt0 10614
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-nel 3124  df-ral 3143  df-rex 3144  df-reu 3145  df-rab 3147  df-v 3496  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-pss 3954  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4568  df-pr 4570  df-tp 4572  df-op 4574  df-uni 4839  df-iun 4921  df-br 5067  df-opab 5129  df-mpt 5147  df-tr 5173  df-id 5460  df-eprel 5465  df-po 5474  df-so 5475  df-fr 5514  df-we 5516  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-rn 5566  df-res 5567  df-ima 5568  df-pred 6148  df-ord 6194  df-on 6195  df-lim 6196  df-suc 6197  df-iota 6314  df-fun 6357  df-fn 6358  df-f 6359  df-f1 6360  df-fo 6361  df-f1o 6362  df-fv 6363  df-riota 7114  df-ov 7159  df-oprab 7160  df-mpo 7161  df-om 7581  df-2nd 7690  df-wrecs 7947  df-recs 8008  df-rdg 8046  df-er 8289  df-en 8510  df-dom 8511  df-sdom 8512  df-pnf 10677  df-mnf 10678  df-xr 10679  df-ltxr 10680  df-le 10681  df-sub 10872  df-neg 10873  df-nn 11639  df-n0 11899  df-z 11983  df-uz 12245  df-seq 13371  df-relexp 14380
This theorem is referenced by:  rtrclind  14424
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