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Theorem wemaplem1 8492
Description: Value of the lexicographic order on a sequence space. (Contributed by Stefan O'Rear, 18-Jan-2015.)
Hypothesis
Ref Expression
wemapso.t 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐴 ((𝑥𝑧)𝑆(𝑦𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤)))}
Assertion
Ref Expression
wemaplem1 ((𝑃𝑉𝑄𝑊) → (𝑃𝑇𝑄 ↔ ∃𝑎𝐴 ((𝑃𝑎)𝑆(𝑄𝑎) ∧ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏)))))
Distinct variable groups:   𝑎,𝑏,𝑥   𝑇,𝑎,𝑏   𝑤,𝑎,𝑦,𝑧,𝑏,𝑥,𝐴   𝑃,𝑎,𝑏,𝑤,𝑥,𝑦,𝑧   𝑄,𝑎,𝑏,𝑤,𝑥,𝑦,𝑧   𝑅,𝑎,𝑏,𝑤,𝑥,𝑦,𝑧   𝑆,𝑎,𝑏,𝑤,𝑥,𝑦,𝑧
Allowed substitution hints:   𝑇(𝑥,𝑦,𝑧,𝑤)   𝑉(𝑥,𝑦,𝑧,𝑤,𝑎,𝑏)   𝑊(𝑥,𝑦,𝑧,𝑤,𝑎,𝑏)

Proof of Theorem wemaplem1
StepHypRef Expression
1 fveq1 6228 . . . . . 6 (𝑥 = 𝑃 → (𝑥𝑧) = (𝑃𝑧))
2 fveq1 6228 . . . . . 6 (𝑦 = 𝑄 → (𝑦𝑧) = (𝑄𝑧))
31, 2breqan12d 4701 . . . . 5 ((𝑥 = 𝑃𝑦 = 𝑄) → ((𝑥𝑧)𝑆(𝑦𝑧) ↔ (𝑃𝑧)𝑆(𝑄𝑧)))
4 fveq1 6228 . . . . . . . 8 (𝑥 = 𝑃 → (𝑥𝑤) = (𝑃𝑤))
5 fveq1 6228 . . . . . . . 8 (𝑦 = 𝑄 → (𝑦𝑤) = (𝑄𝑤))
64, 5eqeqan12d 2667 . . . . . . 7 ((𝑥 = 𝑃𝑦 = 𝑄) → ((𝑥𝑤) = (𝑦𝑤) ↔ (𝑃𝑤) = (𝑄𝑤)))
76imbi2d 329 . . . . . 6 ((𝑥 = 𝑃𝑦 = 𝑄) → ((𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤)) ↔ (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤))))
87ralbidv 3015 . . . . 5 ((𝑥 = 𝑃𝑦 = 𝑄) → (∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤)) ↔ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤))))
93, 8anbi12d 747 . . . 4 ((𝑥 = 𝑃𝑦 = 𝑄) → (((𝑥𝑧)𝑆(𝑦𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤))) ↔ ((𝑃𝑧)𝑆(𝑄𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤)))))
109rexbidv 3081 . . 3 ((𝑥 = 𝑃𝑦 = 𝑄) → (∃𝑧𝐴 ((𝑥𝑧)𝑆(𝑦𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤))) ↔ ∃𝑧𝐴 ((𝑃𝑧)𝑆(𝑄𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤)))))
11 fveq2 6229 . . . . . 6 (𝑧 = 𝑎 → (𝑃𝑧) = (𝑃𝑎))
12 fveq2 6229 . . . . . 6 (𝑧 = 𝑎 → (𝑄𝑧) = (𝑄𝑎))
1311, 12breq12d 4698 . . . . 5 (𝑧 = 𝑎 → ((𝑃𝑧)𝑆(𝑄𝑧) ↔ (𝑃𝑎)𝑆(𝑄𝑎)))
14 breq2 4689 . . . . . . . 8 (𝑧 = 𝑎 → (𝑤𝑅𝑧𝑤𝑅𝑎))
1514imbi1d 330 . . . . . . 7 (𝑧 = 𝑎 → ((𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤)) ↔ (𝑤𝑅𝑎 → (𝑃𝑤) = (𝑄𝑤))))
1615ralbidv 3015 . . . . . 6 (𝑧 = 𝑎 → (∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤)) ↔ ∀𝑤𝐴 (𝑤𝑅𝑎 → (𝑃𝑤) = (𝑄𝑤))))
17 breq1 4688 . . . . . . . 8 (𝑤 = 𝑏 → (𝑤𝑅𝑎𝑏𝑅𝑎))
18 fveq2 6229 . . . . . . . . 9 (𝑤 = 𝑏 → (𝑃𝑤) = (𝑃𝑏))
19 fveq2 6229 . . . . . . . . 9 (𝑤 = 𝑏 → (𝑄𝑤) = (𝑄𝑏))
2018, 19eqeq12d 2666 . . . . . . . 8 (𝑤 = 𝑏 → ((𝑃𝑤) = (𝑄𝑤) ↔ (𝑃𝑏) = (𝑄𝑏)))
2117, 20imbi12d 333 . . . . . . 7 (𝑤 = 𝑏 → ((𝑤𝑅𝑎 → (𝑃𝑤) = (𝑄𝑤)) ↔ (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏))))
2221cbvralv 3201 . . . . . 6 (∀𝑤𝐴 (𝑤𝑅𝑎 → (𝑃𝑤) = (𝑄𝑤)) ↔ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏)))
2316, 22syl6bb 276 . . . . 5 (𝑧 = 𝑎 → (∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤)) ↔ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏))))
2413, 23anbi12d 747 . . . 4 (𝑧 = 𝑎 → (((𝑃𝑧)𝑆(𝑄𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤))) ↔ ((𝑃𝑎)𝑆(𝑄𝑎) ∧ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏)))))
2524cbvrexv 3202 . . 3 (∃𝑧𝐴 ((𝑃𝑧)𝑆(𝑄𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑃𝑤) = (𝑄𝑤))) ↔ ∃𝑎𝐴 ((𝑃𝑎)𝑆(𝑄𝑎) ∧ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏))))
2610, 25syl6bb 276 . 2 ((𝑥 = 𝑃𝑦 = 𝑄) → (∃𝑧𝐴 ((𝑥𝑧)𝑆(𝑦𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤))) ↔ ∃𝑎𝐴 ((𝑃𝑎)𝑆(𝑄𝑎) ∧ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏)))))
27 wemapso.t . 2 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧𝐴 ((𝑥𝑧)𝑆(𝑦𝑧) ∧ ∀𝑤𝐴 (𝑤𝑅𝑧 → (𝑥𝑤) = (𝑦𝑤)))}
2826, 27brabga 5018 1 ((𝑃𝑉𝑄𝑊) → (𝑃𝑇𝑄 ↔ ∃𝑎𝐴 ((𝑃𝑎)𝑆(𝑄𝑎) ∧ ∀𝑏𝐴 (𝑏𝑅𝑎 → (𝑃𝑏) = (𝑄𝑏)))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383   = wceq 1523  wcel 2030  wral 2941  wrex 2942   class class class wbr 4685  {copab 4745  cfv 5926
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-sep 4814  ax-nul 4822  ax-pr 4936
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ral 2946  df-rex 2947  df-rab 2950  df-v 3233  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-sn 4211  df-pr 4213  df-op 4217  df-uni 4469  df-br 4686  df-opab 4746  df-iota 5889  df-fv 5934
This theorem is referenced by:  wemaplem2  8493  wemaplem3  8494  wemappo  8495  wemapsolem  8496
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