Users' Mathboxes Mathbox for Jonathan Ben-Naim < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  bnj149 Structured version   Visualization version   GIF version

Theorem bnj149 30706
Description: Technical lemma for bnj151 30708. This lemma may no longer be used or have become an indirect lemma of the theorem in question (i.e. a lemma of a lemma... of the theorem). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) (Proof shortened by Mario Carneiro, 22-Dec-2016.) (New usage is discouraged.)
Hypotheses
Ref Expression
bnj149.1 (𝜃1 ↔ ((𝑅 FrSe 𝐴𝑥𝐴) → ∃*𝑓(𝑓 Fn 1𝑜𝜑′𝜓′)))
bnj149.2 (𝜁0 ↔ (𝑓 Fn 1𝑜𝜑′𝜓′))
bnj149.3 (𝜁1[𝑔 / 𝑓]𝜁0)
bnj149.4 (𝜑1[𝑔 / 𝑓]𝜑′)
bnj149.5 (𝜓1[𝑔 / 𝑓]𝜓′)
bnj149.6 (𝜑′ ↔ (𝑓‘∅) = pred(𝑥, 𝐴, 𝑅))
Assertion
Ref Expression
bnj149 𝜃1
Distinct variable groups:   𝐴,𝑓,𝑔,𝑥   𝑅,𝑓,𝑔,𝑥   𝑓,𝜁1   𝑔,𝜁0
Allowed substitution hints:   𝜑′(𝑥,𝑓,𝑔)   𝜓′(𝑥,𝑓,𝑔)   𝜁0(𝑥,𝑓)   𝜑1(𝑥,𝑓,𝑔)   𝜓1(𝑥,𝑓,𝑔)   𝜃1(𝑥,𝑓,𝑔)   𝜁1(𝑥,𝑔)

Proof of Theorem bnj149
StepHypRef Expression
1 simpr1 1065 . . . . . . . 8 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → 𝑓 Fn 1𝑜)
2 df1o2 7532 . . . . . . . . 9 1𝑜 = {∅}
32fneq2i 5954 . . . . . . . 8 (𝑓 Fn 1𝑜𝑓 Fn {∅})
41, 3sylib 208 . . . . . . 7 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → 𝑓 Fn {∅})
5 simpr2 1066 . . . . . . . . . 10 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → 𝜑′)
6 bnj149.6 . . . . . . . . . 10 (𝜑′ ↔ (𝑓‘∅) = pred(𝑥, 𝐴, 𝑅))
75, 6sylib 208 . . . . . . . . 9 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → (𝑓‘∅) = pred(𝑥, 𝐴, 𝑅))
8 fvex 6168 . . . . . . . . . 10 (𝑓‘∅) ∈ V
98elsn 4170 . . . . . . . . 9 ((𝑓‘∅) ∈ { pred(𝑥, 𝐴, 𝑅)} ↔ (𝑓‘∅) = pred(𝑥, 𝐴, 𝑅))
107, 9sylibr 224 . . . . . . . 8 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → (𝑓‘∅) ∈ { pred(𝑥, 𝐴, 𝑅)})
11 0ex 4760 . . . . . . . . 9 ∅ ∈ V
12 fveq2 6158 . . . . . . . . . 10 (𝑔 = ∅ → (𝑓𝑔) = (𝑓‘∅))
1312eleq1d 2683 . . . . . . . . 9 (𝑔 = ∅ → ((𝑓𝑔) ∈ { pred(𝑥, 𝐴, 𝑅)} ↔ (𝑓‘∅) ∈ { pred(𝑥, 𝐴, 𝑅)}))
1411, 13ralsn 4200 . . . . . . . 8 (∀𝑔 ∈ {∅} (𝑓𝑔) ∈ { pred(𝑥, 𝐴, 𝑅)} ↔ (𝑓‘∅) ∈ { pred(𝑥, 𝐴, 𝑅)})
1510, 14sylibr 224 . . . . . . 7 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → ∀𝑔 ∈ {∅} (𝑓𝑔) ∈ { pred(𝑥, 𝐴, 𝑅)})
16 ffnfv 6354 . . . . . . 7 (𝑓:{∅}⟶{ pred(𝑥, 𝐴, 𝑅)} ↔ (𝑓 Fn {∅} ∧ ∀𝑔 ∈ {∅} (𝑓𝑔) ∈ { pred(𝑥, 𝐴, 𝑅)}))
174, 15, 16sylanbrc 697 . . . . . 6 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → 𝑓:{∅}⟶{ pred(𝑥, 𝐴, 𝑅)})
18 bnj93 30694 . . . . . . . 8 ((𝑅 FrSe 𝐴𝑥𝐴) → pred(𝑥, 𝐴, 𝑅) ∈ V)
1918adantr 481 . . . . . . 7 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → pred(𝑥, 𝐴, 𝑅) ∈ V)
20 fsng 6369 . . . . . . 7 ((∅ ∈ V ∧ pred(𝑥, 𝐴, 𝑅) ∈ V) → (𝑓:{∅}⟶{ pred(𝑥, 𝐴, 𝑅)} ↔ 𝑓 = {⟨∅, pred(𝑥, 𝐴, 𝑅)⟩}))
2111, 19, 20sylancr 694 . . . . . 6 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → (𝑓:{∅}⟶{ pred(𝑥, 𝐴, 𝑅)} ↔ 𝑓 = {⟨∅, pred(𝑥, 𝐴, 𝑅)⟩}))
2217, 21mpbid 222 . . . . 5 (((𝑅 FrSe 𝐴𝑥𝐴) ∧ (𝑓 Fn 1𝑜𝜑′𝜓′)) → 𝑓 = {⟨∅, pred(𝑥, 𝐴, 𝑅)⟩})
2322ex 450 . . . 4 ((𝑅 FrSe 𝐴𝑥𝐴) → ((𝑓 Fn 1𝑜𝜑′𝜓′) → 𝑓 = {⟨∅, pred(𝑥, 𝐴, 𝑅)⟩}))
2423alrimiv 1852 . . 3 ((𝑅 FrSe 𝐴𝑥𝐴) → ∀𝑓((𝑓 Fn 1𝑜𝜑′𝜓′) → 𝑓 = {⟨∅, pred(𝑥, 𝐴, 𝑅)⟩}))
25 mo2icl 3372 . . 3 (∀𝑓((𝑓 Fn 1𝑜𝜑′𝜓′) → 𝑓 = {⟨∅, pred(𝑥, 𝐴, 𝑅)⟩}) → ∃*𝑓(𝑓 Fn 1𝑜𝜑′𝜓′))
2624, 25syl 17 . 2 ((𝑅 FrSe 𝐴𝑥𝐴) → ∃*𝑓(𝑓 Fn 1𝑜𝜑′𝜓′))
27 bnj149.1 . 2 (𝜃1 ↔ ((𝑅 FrSe 𝐴𝑥𝐴) → ∃*𝑓(𝑓 Fn 1𝑜𝜑′𝜓′)))
2826, 27mpbir 221 1 𝜃1
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  w3a 1036  wal 1478   = wceq 1480  wcel 1987  ∃*wmo 2470  wral 2908  Vcvv 3190  [wsbc 3422  c0 3897  {csn 4155  cop 4161   Fn wfn 5852  wf 5853  cfv 5857  1𝑜c1o 7513   predc-bnj14 30514   FrSe w-bnj15 30518
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4751  ax-nul 4759  ax-pr 4877
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ral 2913  df-rex 2914  df-reu 2915  df-rab 2917  df-v 3192  df-sbc 3423  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-nul 3898  df-if 4065  df-sn 4156  df-pr 4158  df-op 4162  df-uni 4410  df-br 4624  df-opab 4684  df-mpt 4685  df-id 4999  df-xp 5090  df-rel 5091  df-cnv 5092  df-co 5093  df-dm 5094  df-rn 5095  df-suc 5698  df-iota 5820  df-fun 5859  df-fn 5860  df-f 5861  df-f1 5862  df-fo 5863  df-f1o 5864  df-fv 5865  df-1o 7520  df-bnj13 30517  df-bnj15 30519
This theorem is referenced by:  bnj151  30708
  Copyright terms: Public domain W3C validator