Theorem toslublem 33151

Description: Lemma for toslub 33152 and xrsclat 33190. (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 736	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝐾 ∈ Toset)
3		simplr 778	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑎 ∈ 𝐵)
4		toslub.2	. . . . . . 7 ⊢ (𝜑 → 𝐴 ⊆ 𝐵)
5	4	adantr 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → 𝐴 ⊆ 𝐵)
6	5	sselda 3937	. . . . 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 18453	. . . . 5 ⊢ ((𝐾 ∈ Toset ∧ 𝑎 ∈ 𝐵 ∧ 𝑏 ∈ 𝐵) → (𝑎 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑎))
11	2, 3, 6, 10	syl3anc 1391	. . . 4 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → (𝑎 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑎))
12	11	con2bid 356	. . 3 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → (𝑏 ≤ 𝑎 ↔ ¬ 𝑎 < 𝑏))
13	12	ralbidva 3184	. 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑎 ↔ ∀𝑏 ∈ 𝐴 ¬ 𝑎 < 𝑏))
14	4	ad2antrr 736	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝐴 ⊆ 𝐵)
15		simpr 488	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑏 ∈ 𝐴)
16	14, 15	sseldd 3938	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → 𝑏 ∈ 𝐵)
17	7, 8, 9	tltnle 18453	. . . . . . . . . . . . 13 ⊢ ((𝐾 ∈ Toset ∧ 𝑐 ∈ 𝐵 ∧ 𝑏 ∈ 𝐵) → (𝑐 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑐))
18	1, 17	syl3an1 1177	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐵 ∧ 𝑏 ∈ 𝐵) → (𝑐 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑐))
19	18	3expa 1132	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐵) → (𝑐 < 𝑏 ↔ ¬ 𝑏 ≤ 𝑐))
20	19	con2bid 356	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐵) → (𝑏 ≤ 𝑐 ↔ ¬ 𝑐 < 𝑏))
21	16, 20	syldan 600	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑐 ∈ 𝐵) ∧ 𝑏 ∈ 𝐴) → (𝑏 ≤ 𝑐 ↔ ¬ 𝑐 < 𝑏))
22	21	ralbidva 3184	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 ↔ ∀𝑏 ∈ 𝐴 ¬ 𝑐 < 𝑏))
23		breq2 5105	. . . . . . . . . . 11 ⊢ (𝑏 = 𝑑 → (𝑐 < 𝑏 ↔ 𝑐 < 𝑑))
24	23	notbid 320	. . . . . . . . . 10 ⊢ (𝑏 = 𝑑 → (¬ 𝑐 < 𝑏 ↔ ¬ 𝑐 < 𝑑))
25	24	cbvralvw 3241	. . . . . . . . 9 ⊢ (∀𝑏 ∈ 𝐴 ¬ 𝑐 < 𝑏 ↔ ∀𝑑 ∈ 𝐴 ¬ 𝑐 < 𝑑)
26		ralnex 3089	. . . . . . . . 9 ⊢ (∀𝑑 ∈ 𝐴 ¬ 𝑐 < 𝑑 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)
27	25, 26	bitri 277	. . . . . . . 8 ⊢ (∀𝑏 ∈ 𝐴 ¬ 𝑐 < 𝑏 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)
28	22, 27	bitrdi 289	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑐 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
29	28	adantlr 725	. . . . . 6 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 ↔ ¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
30	1	ad2antrr 736	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → 𝐾 ∈ Toset)
31		simpr 488	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → 𝑐 ∈ 𝐵)
32		simplr 778	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → 𝑎 ∈ 𝐵)
33	7, 8, 9	tltnle 18453	. . . . . . . 8 ⊢ ((𝐾 ∈ Toset ∧ 𝑐 ∈ 𝐵 ∧ 𝑎 ∈ 𝐵) → (𝑐 < 𝑎 ↔ ¬ 𝑎 ≤ 𝑐))
34	30, 31, 32, 33	syl3anc 1391	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → (𝑐 < 𝑎 ↔ ¬ 𝑎 ≤ 𝑐))
35	34	con2bid 356	. . . . . 6 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → (𝑎 ≤ 𝑐 ↔ ¬ 𝑐 < 𝑎))
36	29, 35	imbi12d 346	. . . . 5 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → ((∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ (¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑 → ¬ 𝑐 < 𝑎)))
37		con34b 318	. . . . 5 ⊢ ((𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑) ↔ (¬ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑 → ¬ 𝑐 < 𝑎))
38	36, 37	bitr4di 291	. . . 4 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → ((∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)))
39	38	ralbidva 3184	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑐 ∈ 𝐵 (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ ∀𝑐 ∈ 𝐵 (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)))
40		breq1 5104	. . . . 5 ⊢ (𝑏 = 𝑐 → (𝑏 < 𝑎 ↔ 𝑐 < 𝑎))
41		breq1 5104	. . . . . 6 ⊢ (𝑏 = 𝑐 → (𝑏 < 𝑑 ↔ 𝑐 < 𝑑))
42	41	rexbidv 3187	. . . . 5 ⊢ (𝑏 = 𝑐 → (∃𝑑 ∈ 𝐴 𝑏 < 𝑑 ↔ ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
43	40, 42	imbi12d 346	. . . 4 ⊢ (𝑏 = 𝑐 → ((𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑) ↔ (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑)))
44	43	cbvralvw 3241	. . 3 ⊢ (∀𝑏 ∈ 𝐵 (𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑) ↔ ∀𝑐 ∈ 𝐵 (𝑐 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑐 < 𝑑))
45	39, 44	bitr4di 291	. 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑐 ∈ 𝐵 (∀𝑏 ∈ 𝐴 𝑏 ≤ 𝑐 → 𝑎 ≤ 𝑐) ↔ ∀𝑏 ∈ 𝐵 (𝑏 < 𝑎 → ∃𝑑 ∈ 𝐴 𝑏 < 𝑑)))
46	13, 45	anbi12d 641	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 208   ∧ wa 399   = wceq 1561   ∈ wcel 2143  ∀wral 3077  ∃wrex 3087   ⊆ wss 3905   class class class wbr 5101  ‘cfv 6522  Basecbs 17246  lecple 17294  ltcplt 18341  Tosetctos 18447

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1816  ax-4 1830  ax-5 1931  ax-6 1988  ax-7 2029  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5247  ax-nul 5257  ax-pr 5391

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1101  df-tru 1564  df-fal 1574  df-ex 1801  df-nf 1805  df-sb 2092  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3078  df-rex 3088  df-rab 3416  df-v 3457  df-sbc 3746  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4482  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5102  df-opab 5164  df-mpt 5183  df-id 5543  df-xp 5654  df-rel 5655  df-cnv 5656  df-co 5657  df-dm 5658  df-iota 6478  df-fun 6524  df-fv 6530  df-proset 18327  df-poset 18346  df-plt 18361  df-toset 18448

This theorem is referenced by:  toslub  33152  xrsclat  33190