Theorem bnj1189 32283

Description: Technical lemma for bnj69 32284. 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
bnj1189.1	⊢ (𝜑 ↔ (𝑅 FrSe 𝐴 ∧ 𝐵 ⊆ 𝐴 ∧ 𝐵 ≠ ∅))
bnj1189.2	⊢ (𝜓 ↔ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥))
bnj1189.3	⊢ (𝜒 ↔ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)

Assertion

Ref	Expression
bnj1189	⊢ (𝜑 → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)

Distinct variable groups:   𝑥,𝐵,𝑦   𝑥,𝑅,𝑦   𝜑,𝑥,𝑦

Allowed substitution hints:   𝜓(𝑥,𝑦)   𝜒(𝑥,𝑦)   𝐴(𝑥,𝑦)

Proof of Theorem bnj1189

Dummy variables 𝑤 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		bnj1189.1	. . . . . 6 ⊢ (𝜑 ↔ (𝑅 FrSe 𝐴 ∧ 𝐵 ⊆ 𝐴 ∧ 𝐵 ≠ ∅))
2		n0 4312	. . . . . . 7 ⊢ (𝐵 ≠ ∅ ↔ ∃𝑥 𝑥 ∈ 𝐵)
3	2	biimpi 218	. . . . . 6 ⊢ (𝐵 ≠ ∅ → ∃𝑥 𝑥 ∈ 𝐵)
4	1, 3	bnj837 32034	. . . . 5 ⊢ (𝜑 → ∃𝑥 𝑥 ∈ 𝐵)
5	4	ancli 551	. . . 4 ⊢ (𝜑 → (𝜑 ∧ ∃𝑥 𝑥 ∈ 𝐵))
6		19.42v 1954	. . . 4 ⊢ (∃𝑥(𝜑 ∧ 𝑥 ∈ 𝐵) ↔ (𝜑 ∧ ∃𝑥 𝑥 ∈ 𝐵))
7	5, 6	sylibr 236	. . 3 ⊢ (𝜑 → ∃𝑥(𝜑 ∧ 𝑥 ∈ 𝐵))
8		3simpc 1146	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝜒) → (𝑥 ∈ 𝐵 ∧ 𝜒))
9		bnj1189.3	. . . . . . . . . 10 ⊢ (𝜒 ↔ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
10	9	anbi2i 624	. . . . . . . . 9 ⊢ ((𝑥 ∈ 𝐵 ∧ 𝜒) ↔ (𝑥 ∈ 𝐵 ∧ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥))
11	8, 10	sylib 220	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝜒) → (𝑥 ∈ 𝐵 ∧ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥))
12	11	19.8ad 2181	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝜒) → ∃𝑥(𝑥 ∈ 𝐵 ∧ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥))
13		df-rex 3146	. . . . . . 7 ⊢ (∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥 ↔ ∃𝑥(𝑥 ∈ 𝐵 ∧ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥))
14	12, 13	sylibr 236	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝜒) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
15	14	3comr 1121	. . . . 5 ⊢ ((𝜒 ∧ 𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
16	15	3expib 1118	. . . 4 ⊢ (𝜒 → ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥))
17		simp1 1132	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → 𝜑)
18		simp2 1133	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → 𝑥 ∈ 𝐵)
19		rexnal 3240	. . . . . . . . . . . . . . . . . 18 ⊢ (∃𝑦 ∈ 𝐵 ¬ ¬ 𝑦𝑅𝑥 ↔ ¬ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
20	19	bicomi 226	. . . . . . . . . . . . . . . . 17 ⊢ (¬ ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥 ↔ ∃𝑦 ∈ 𝐵 ¬ ¬ 𝑦𝑅𝑥)
21	20, 9	xchnxbir 335	. . . . . . . . . . . . . . . 16 ⊢ (¬ 𝜒 ↔ ∃𝑦 ∈ 𝐵 ¬ ¬ 𝑦𝑅𝑥)
22		notnotb 317	. . . . . . . . . . . . . . . . 17 ⊢ (𝑦𝑅𝑥 ↔ ¬ ¬ 𝑦𝑅𝑥)
23	22	rexbii 3249	. . . . . . . . . . . . . . . 16 ⊢ (∃𝑦 ∈ 𝐵 𝑦𝑅𝑥 ↔ ∃𝑦 ∈ 𝐵 ¬ ¬ 𝑦𝑅𝑥)
24	21, 23	bitr4i 280	. . . . . . . . . . . . . . 15 ⊢ (¬ 𝜒 ↔ ∃𝑦 ∈ 𝐵 𝑦𝑅𝑥)
25	24	biimpi 218	. . . . . . . . . . . . . 14 ⊢ (¬ 𝜒 → ∃𝑦 ∈ 𝐵 𝑦𝑅𝑥)
26	25	bnj1196 32068	. . . . . . . . . . . . 13 ⊢ (¬ 𝜒 → ∃𝑦(𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥))
27	26	3ad2ant3 1131	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑦(𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥))
28		3anass 1091	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥) ↔ (𝑥 ∈ 𝐵 ∧ (𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥)))
29	28	exbii 1848	. . . . . . . . . . . . 13 ⊢ (∃𝑦(𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥) ↔ ∃𝑦(𝑥 ∈ 𝐵 ∧ (𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥)))
30		19.42v 1954	. . . . . . . . . . . . 13 ⊢ (∃𝑦(𝑥 ∈ 𝐵 ∧ (𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥)) ↔ (𝑥 ∈ 𝐵 ∧ ∃𝑦(𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥)))
31	29, 30	bitri 277	. . . . . . . . . . . 12 ⊢ (∃𝑦(𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥) ↔ (𝑥 ∈ 𝐵 ∧ ∃𝑦(𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥)))
32	18, 27, 31	sylanbrc 585	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑦(𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥))
33		bnj1189.2	. . . . . . . . . . 11 ⊢ (𝜓 ↔ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵 ∧ 𝑦𝑅𝑥))
34	32, 33	bnj1198 32069	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑦𝜓)
35		19.42v 1954	. . . . . . . . . 10 ⊢ (∃𝑦(𝜑 ∧ 𝜓) ↔ (𝜑 ∧ ∃𝑦𝜓))
36	17, 34, 35	sylanbrc 585	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑦(𝜑 ∧ 𝜓))
37	1, 33	bnj1190 32282	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝜓) → ∃𝑤 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ¬ 𝑧𝑅𝑤)
38	36, 37	bnj593 32018	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑦∃𝑤 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ¬ 𝑧𝑅𝑤)
39	38	bnj937 32045	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑤 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ¬ 𝑧𝑅𝑤)
40	39	bnj1185 32067	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ ¬ 𝜒) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
41	40	3comr 1121	. . . . 5 ⊢ ((¬ 𝜒 ∧ 𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
42	41	3expib 1118	. . . 4 ⊢ (¬ 𝜒 → ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥))
43	16, 42	pm2.61i 184	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
44	7, 43	bnj593 32018	. 2 ⊢ (𝜑 → ∃𝑥∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
45		nfre1 3308	. . 3 ⊢ Ⅎ𝑥∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥
46	45	19.9 2205	. 2 ⊢ (∃𝑥∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥 ↔ ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)
47	44, 46	sylib 220	1 ⊢ (𝜑 → ∃𝑥 ∈ 𝐵 ∀𝑦 ∈ 𝐵 ¬ 𝑦𝑅𝑥)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1083  ∃wex 1780   ∈ wcel 2114   ≠ wne 3018  ∀wral 3140  ∃wrex 3141   ⊆ wss 3938  ∅c0 4293   class class class wbr 5068   FrSe w-bnj15 31964

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 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-reg 9058  ax-inf2 9106

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-fal 1550  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-reu 3147  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-om 7583  df-1o 8104  df-bnj17 31959  df-bnj14 31961  df-bnj13 31963  df-bnj15 31965  df-bnj18 31967  df-bnj19 31969

This theorem is referenced by:  bnj69  32284