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Theorem bnj1286 31415
Description: Technical lemma for bnj60 31458. 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.) (New usage is discouraged.)
Hypotheses
Ref Expression
bnj1286.1 𝐵 = {𝑑 ∣ (𝑑𝐴 ∧ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑)}
bnj1286.2 𝑌 = ⟨𝑥, (𝑓 ↾ pred(𝑥, 𝐴, 𝑅))⟩
bnj1286.3 𝐶 = {𝑓 ∣ ∃𝑑𝐵 (𝑓 Fn 𝑑 ∧ ∀𝑥𝑑 (𝑓𝑥) = (𝐺𝑌))}
bnj1286.4 𝐷 = (dom 𝑔 ∩ dom )
bnj1286.5 𝐸 = {𝑥𝐷 ∣ (𝑔𝑥) ≠ (𝑥)}
bnj1286.6 (𝜑 ↔ (𝑅 FrSe 𝐴𝑔𝐶𝐶 ∧ (𝑔𝐷) ≠ (𝐷)))
bnj1286.7 (𝜓 ↔ (𝜑𝑥𝐸 ∧ ∀𝑦𝐸 ¬ 𝑦𝑅𝑥))
Assertion
Ref Expression
bnj1286 (𝜓 → pred(𝑥, 𝐴, 𝑅) ⊆ 𝐷)
Distinct variable groups:   𝐴,𝑑,𝑓   𝐵,𝑓,𝑔   𝐵,,𝑓   𝑥,𝐷   𝑓,𝐺,𝑔   ,𝐺   𝑅,𝑑,𝑓   𝑔,𝑌   ,𝑌   𝑔,𝑑,𝑥,𝑓   ,𝑑,𝑥
Allowed substitution hints:   𝜑(𝑥,𝑦,𝑓,𝑔,,𝑑)   𝜓(𝑥,𝑦,𝑓,𝑔,,𝑑)   𝐴(𝑥,𝑦,𝑔,)   𝐵(𝑥,𝑦,𝑑)   𝐶(𝑥,𝑦,𝑓,𝑔,,𝑑)   𝐷(𝑦,𝑓,𝑔,,𝑑)   𝑅(𝑥,𝑦,𝑔,)   𝐸(𝑥,𝑦,𝑓,𝑔,,𝑑)   𝐺(𝑥,𝑦,𝑑)   𝑌(𝑥,𝑦,𝑓,𝑑)

Proof of Theorem bnj1286
StepHypRef Expression
1 bnj1286.7 . . . . 5 (𝜓 ↔ (𝜑𝑥𝐸 ∧ ∀𝑦𝐸 ¬ 𝑦𝑅𝑥))
2 bnj1286.1 . . . . . . . . 9 𝐵 = {𝑑 ∣ (𝑑𝐴 ∧ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑)}
3 bnj1286.2 . . . . . . . . 9 𝑌 = ⟨𝑥, (𝑓 ↾ pred(𝑥, 𝐴, 𝑅))⟩
4 bnj1286.3 . . . . . . . . 9 𝐶 = {𝑓 ∣ ∃𝑑𝐵 (𝑓 Fn 𝑑 ∧ ∀𝑥𝑑 (𝑓𝑥) = (𝐺𝑌))}
5 bnj1286.4 . . . . . . . . 9 𝐷 = (dom 𝑔 ∩ dom )
6 bnj1286.5 . . . . . . . . 9 𝐸 = {𝑥𝐷 ∣ (𝑔𝑥) ≠ (𝑥)}
7 bnj1286.6 . . . . . . . . 9 (𝜑 ↔ (𝑅 FrSe 𝐴𝑔𝐶𝐶 ∧ (𝑔𝐷) ≠ (𝐷)))
82, 3, 4, 5, 6, 7, 1bnj1256 31411 . . . . . . . 8 (𝜑 → ∃𝑑𝐵 𝑔 Fn 𝑑)
98bnj1196 31193 . . . . . . 7 (𝜑 → ∃𝑑(𝑑𝐵𝑔 Fn 𝑑))
102bnj1517 31248 . . . . . . . . 9 (𝑑𝐵 → ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑)
1110adantr 472 . . . . . . . 8 ((𝑑𝐵𝑔 Fn 𝑑) → ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑)
12 fndm 6151 . . . . . . . . . 10 (𝑔 Fn 𝑑 → dom 𝑔 = 𝑑)
13 sseq2 3768 . . . . . . . . . . 11 (dom 𝑔 = 𝑑 → ( pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔 ↔ pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
1413raleqbi1dv 3285 . . . . . . . . . 10 (dom 𝑔 = 𝑑 → (∀𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔 ↔ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
1512, 14syl 17 . . . . . . . . 9 (𝑔 Fn 𝑑 → (∀𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔 ↔ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
1615adantl 473 . . . . . . . 8 ((𝑑𝐵𝑔 Fn 𝑑) → (∀𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔 ↔ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
1711, 16mpbird 247 . . . . . . 7 ((𝑑𝐵𝑔 Fn 𝑑) → ∀𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔)
189, 17bnj593 31143 . . . . . 6 (𝜑 → ∃𝑑𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔)
1918bnj937 31170 . . . . 5 (𝜑 → ∀𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔)
201, 19bnj835 31157 . . . 4 (𝜓 → ∀𝑥 ∈ dom 𝑔 pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔)
216ssrab3 3829 . . . . . . 7 𝐸𝐷
225bnj1292 31214 . . . . . . 7 𝐷 ⊆ dom 𝑔
2321, 22sstri 3753 . . . . . 6 𝐸 ⊆ dom 𝑔
2423sseli 3740 . . . . 5 (𝑥𝐸𝑥 ∈ dom 𝑔)
251, 24bnj836 31158 . . . 4 (𝜓𝑥 ∈ dom 𝑔)
2620, 25bnj1294 31216 . . 3 (𝜓 → pred(𝑥, 𝐴, 𝑅) ⊆ dom 𝑔)
272, 3, 4, 5, 6, 7, 1bnj1259 31412 . . . . . . . 8 (𝜑 → ∃𝑑𝐵 Fn 𝑑)
2827bnj1196 31193 . . . . . . 7 (𝜑 → ∃𝑑(𝑑𝐵 Fn 𝑑))
2910adantr 472 . . . . . . . 8 ((𝑑𝐵 Fn 𝑑) → ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑)
30 fndm 6151 . . . . . . . . . 10 ( Fn 𝑑 → dom = 𝑑)
31 sseq2 3768 . . . . . . . . . . 11 (dom = 𝑑 → ( pred(𝑥, 𝐴, 𝑅) ⊆ dom ↔ pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
3231raleqbi1dv 3285 . . . . . . . . . 10 (dom = 𝑑 → (∀𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom ↔ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
3330, 32syl 17 . . . . . . . . 9 ( Fn 𝑑 → (∀𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom ↔ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
3433adantl 473 . . . . . . . 8 ((𝑑𝐵 Fn 𝑑) → (∀𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom ↔ ∀𝑥𝑑 pred(𝑥, 𝐴, 𝑅) ⊆ 𝑑))
3529, 34mpbird 247 . . . . . . 7 ((𝑑𝐵 Fn 𝑑) → ∀𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom )
3628, 35bnj593 31143 . . . . . 6 (𝜑 → ∃𝑑𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom )
3736bnj937 31170 . . . . 5 (𝜑 → ∀𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom )
381, 37bnj835 31157 . . . 4 (𝜓 → ∀𝑥 ∈ dom pred(𝑥, 𝐴, 𝑅) ⊆ dom )
395bnj1293 31215 . . . . . . 7 𝐷 ⊆ dom
4021, 39sstri 3753 . . . . . 6 𝐸 ⊆ dom
4140sseli 3740 . . . . 5 (𝑥𝐸𝑥 ∈ dom )
421, 41bnj836 31158 . . . 4 (𝜓𝑥 ∈ dom )
4338, 42bnj1294 31216 . . 3 (𝜓 → pred(𝑥, 𝐴, 𝑅) ⊆ dom )
4426, 43ssind 3980 . 2 (𝜓 → pred(𝑥, 𝐴, 𝑅) ⊆ (dom 𝑔 ∩ dom ))
4544, 5syl6sseqr 3793 1 (𝜓 → pred(𝑥, 𝐴, 𝑅) ⊆ 𝐷)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wa 383  w3a 1072   = wceq 1632  wcel 2139  {cab 2746  wne 2932  wral 3050  wrex 3051  {crab 3054  cin 3714  wss 3715  cop 4327   class class class wbr 4804  dom cdm 5266  cres 5268   Fn wfn 6044  cfv 6049  w-bnj17 31082   predc-bnj14 31084   FrSe w-bnj15 31088
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ral 3055  df-rex 3056  df-rab 3059  df-v 3342  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-br 4805  df-opab 4865  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-res 5278  df-iota 6012  df-fun 6051  df-fn 6052  df-fv 6057  df-bnj17 31083
This theorem is referenced by:  bnj1280  31416
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