Theorem toslublem 33233

Description: Lemma for toslub 33234 and xrsclat 33272. (Contributed by Thierry Arnoux, 17-Feb-2018.) (Revised by NM, 15-Sep-2018.)

Hypotheses

Ref	Expression
toslub.b	⊢ 𝐵 = (Base‘𝐾)
toslub.l	⊢ < = (lt‘𝐾)
toslub.1	⊢ (𝜑 → 𝐾 ∈ Toset)
toslub.2	⊢ (𝜑 → 𝐴 ⊆ 𝐵)
toslub.e	⊢ ≤ = (le‘𝐾)

Assertion

Ref	Expression
toslublem	⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → ((∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑎 ∧ ∀𝑐 ∈ 𝐵 (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐)) ↔ (∀𝑏 ∈ 𝐴 ¬ 𝑎 < 𝑏 ∧ ∀𝑏 ∈ 𝐵 (𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑))))

Distinct variable groups:   𝑎,𝑏,𝑐,𝑑, <   𝐴,𝑎,𝑏,𝑐,𝑑   𝐵,𝑎,𝑏,𝑐,𝑑   𝐾,𝑎,𝑏,𝑐   𝜑,𝑎,𝑏,𝑐

Allowed substitution hints:   𝜑(𝑑)   𝐾(𝑑)   ≤ (𝑎,𝑏,𝑐,𝑑)

Proof of Theorem toslublem

Step	Hyp	Ref	Expression
1		toslub.1	. . . . . 6 ⊢ (𝜑 → 𝐾 ∈ Toset)
2	1	ad2antrr 738	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝐾 ∈ Toset)
3		simplr 780	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑎 ∈ 𝐵)
4		toslub.2	. . . . . . 7 ⊢ (𝜑 → 𝐴 ⊆ 𝐵)
5	4	adantr 485	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → 𝐴 ⊆ 𝐵)
6	5	sselda 3945	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑏 ∈ 𝐵)
7		toslub.b	. . . . . 6 ⊢ 𝐵 = (Base‘𝐾)
8		toslub.e	. . . . . 6 ⊢ ≤ = (le‘𝐾)
9		toslub.l	. . . . . 6 ⊢ < = (lt‘𝐾)
10	7, 8, 9	tltnle 18476	. . . . 5 ⊢ ((𝐾 ∈ Toset ∧ 𝑎 ∈ 𝐵 ∧ 𝑏 ∈ 𝐵) → (𝑎 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑎))
11	2, 3, 6, 10	syl3anc 1396	. . . 4 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → (𝑎 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑎))
12	11	con2bid 357	. . 3 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → (𝑏 ≤ 𝑎 ↔ ¬ 𝑎 < 𝑏))
13	12	ralbidva 3192	. 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑎 ↔ ∀𝑏 ∈ 𝐴 ¬ 𝑎 < 𝑏))
14	4	ad2antrr 738	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝐴 ⊆ 𝐵)
15		simpr 489	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑏 ∈ 𝐴)
16	14, 15	sseldd 3946	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑏 ∈ 𝐵)
17	7, 8, 9	tltnle 18476	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ Toset ∧ 𝑐 ∈ 𝐵 ∧ 𝑏 ∈ 𝐵) → (𝑐 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑐))
18	1, 17	syl3an1 1179	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐵 ∧ 𝑏 ∈ 𝐵) → (𝑐 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑐))
19	18	3expa 1134	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐵) → (𝑐 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑐))
20	19	con2bid 357	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐵) → (𝑏 ≤ 𝑐 ↔ ¬ 𝑐 < 𝑏))
21	16, 20	syldan 602	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → (𝑏 ≤ 𝑐 ↔ ¬ 𝑐 < 𝑏))
22	21	ralbidva 3192	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 ↔ ∀𝑏 ∈ 𝐴 ¬ 𝑐 < 𝑏))
23		breq2 5117	. . . . . . . . . . 11 ⊢ (𝑏 = 𝑑 → (𝑐 < 𝑏 ↔ 𝑐 < 𝑑))
24	23	notbid 321	. . . . . . . . . 10 ⊢ (𝑏 = 𝑑 → (¬ 𝑐 < 𝑏 ↔ ¬ 𝑐 < 𝑑))
25	24	cbvralvw 3249	. . . . . . . . 9 ⊢ (∀𝑏 ∈ 𝐴 ¬ 𝑐 < 𝑏 ↔ ∀𝑑 ∈ 𝐴 ¬ 𝑐 < 𝑑)
26		ralnex 3097	. . . . . . . . 9 ⊢ (∀𝑑 ∈ 𝐴 ¬ 𝑐 < 𝑑 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)
27	25, 26	bitri 278	. . . . . . . 8 ⊢ (∀𝑏 ∈ 𝐴 ¬ 𝑐 < 𝑏 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)
28	22, 27	bitrdi 290	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
29	28	adantlr 727	. . . . . 6 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
30	1	ad2antrr 738	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → 𝐾 ∈ Toset)
31		simpr 489	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → 𝑐 ∈ 𝐵)
32		simplr 780	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → 𝑎 ∈ 𝐵)
33	7, 8, 9	tltnle 18476	. . . . . . . 8 ⊢ ((𝐾 ∈ Toset ∧ 𝑐 ∈ 𝐵 ∧ 𝑎 ∈ 𝐵) → (𝑐 < 𝑎 ↔ ¬ 𝑎 ≤ 𝑐))
34	30, 31, 32, 33	syl3anc 1396	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → (𝑐 < 𝑎 ↔ ¬ 𝑎 ≤ 𝑐))
35	34	con2bid 357	. . . . . 6 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → (𝑎 ≤ 𝑐 ↔ ¬ 𝑐 < 𝑎))
36	29, 35	imbi12d 347	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → ((∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ (¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑 → ¬ 𝑐 < 𝑎)))
37		con34b 319	. . . . 5 ⊢ ((𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑) ↔ (¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑 → ¬ 𝑐 < 𝑎))
38	36, 37	bitr4di 292	. . . 4 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → ((∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)))
39	38	ralbidva 3192	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑐 ∈ 𝐵 (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ ∀𝑐 ∈ 𝐵 (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)))
40		breq1 5116	. . . . 5 ⊢ (𝑏 = 𝑐 → (𝑏 < 𝑎 ↔ 𝑐 < 𝑎))
41		breq1 5116	. . . . . 6 ⊢ (𝑏 = 𝑐 → (𝑏 < 𝑑 ↔ 𝑐 < 𝑑))
42	41	rexbidv 3195	. . . . 5 ⊢ (𝑏 = 𝑐 → (∃𝑑 ∈ 𝐴 𝑏 < 𝑑 ↔ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
43	40, 42	imbi12d 347	. . . 4 ⊢ (𝑏 = 𝑐 → ((𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑) ↔ (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)))
44	43	cbvralvw 3249	. . 3 ⊢ (∀𝑏 ∈ 𝐵 (𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑) ↔ ∀𝑐 ∈ 𝐵 (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
45	39, 44	bitr4di 292	. 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑐 ∈ 𝐵 (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ ∀𝑏 ∈ 𝐵 (𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑)))
46	13, 45	anbi12d 643	1 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → ((∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑎 ∧ ∀𝑐 ∈ 𝐵 (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐)) ↔ (∀𝑏 ∈ 𝐴 ¬ 𝑎 < 𝑏 ∧ ∀𝑏 ∈ 𝐵 (𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑))))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 400   = wceq 1567   ∈ wcel 2149  ∀wral 3085  ∃wrex 3095   ⊆ wss 3913   class class class wbr 5113  ‘cfv 6537  Basecbs 17269  lecple 17317  ltcplt 18364  Tosetctos 18470

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5261  ax-nul 5271  ax-pr 5405

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-sbc 3754  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-br 5114  df-opab 5178  df-mpt 5197  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-iota 6493  df-fun 6539  df-fv 6545  df-proset 18350  df-poset 18369  df-plt 18384  df-toset 18471

This theorem is referenced by:  toslub  33234  xrsclat  33272