Theorem ipodrsima 17165

Description: The monotone image of a directed set. (Contributed by Stefan O'Rear, 2-Apr-2015.)

Hypotheses

Ref	Expression
ipodrsima.f	⊢ (𝜑 → 𝐹 Fn 𝒫 𝐴)
ipodrsima.m	⊢ ((𝜑 ∧ (𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴)) → (𝐹‘𝑢) ⊆ (𝐹‘𝑣))
ipodrsima.d	⊢ (𝜑 → (toInc‘𝐵) ∈ Dirset)
ipodrsima.s	⊢ (𝜑 → 𝐵 ⊆ 𝒫 𝐴)
ipodrsima.a	⊢ (𝜑 → (𝐹 “ 𝐵) ∈ 𝑉)

Assertion

Ref	Expression
ipodrsima	⊢ (𝜑 → (toInc‘(𝐹 “ 𝐵)) ∈ Dirset)

Distinct variable groups:   𝜑,𝑢,𝑣   𝑢,𝐴,𝑣   𝑢,𝐹,𝑣

Allowed substitution hints:   𝐵(𝑣,𝑢)   𝑉(𝑣,𝑢)

Proof of Theorem ipodrsima

Dummy variables 𝑎 𝑏 𝑐 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ipodrsima.a	. . 3 ⊢ (𝜑 → (𝐹 “ 𝐵) ∈ 𝑉)
2		elex 3212	. . 3 ⊢ ((𝐹 “ 𝐵) ∈ 𝑉 → (𝐹 “ 𝐵) ∈ V)
3	1, 2	syl 17	. 2 ⊢ (𝜑 → (𝐹 “ 𝐵) ∈ V)
4		ipodrsima.d	. . . . 5 ⊢ (𝜑 → (toInc‘𝐵) ∈ Dirset)
5		isipodrs 17161	. . . . 5 ⊢ ((toInc‘𝐵) ∈ Dirset ↔ (𝐵 ∈ V ∧ 𝐵 ≠ ∅ ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 (𝑎 ∪ 𝑏) ⊆ 𝑐))
6	4, 5	sylib 208	. . . 4 ⊢ (𝜑 → (𝐵 ∈ V ∧ 𝐵 ≠ ∅ ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 (𝑎 ∪ 𝑏) ⊆ 𝑐))
7	6	simp2d 1074	. . 3 ⊢ (𝜑 → 𝐵 ≠ ∅)
8		ipodrsima.f	. . . . 5 ⊢ (𝜑 → 𝐹 Fn 𝒫 𝐴)
9		ipodrsima.s	. . . . 5 ⊢ (𝜑 → 𝐵 ⊆ 𝒫 𝐴)
10		fnimaeq0 6013	. . . . 5 ⊢ ((𝐹 Fn 𝒫 𝐴 ∧ 𝐵 ⊆ 𝒫 𝐴) → ((𝐹 “ 𝐵) = ∅ ↔ 𝐵 = ∅))
11	8, 9, 10	syl2anc 693	. . . 4 ⊢ (𝜑 → ((𝐹 “ 𝐵) = ∅ ↔ 𝐵 = ∅))
12	11	necon3bid 2838	. . 3 ⊢ (𝜑 → ((𝐹 “ 𝐵) ≠ ∅ ↔ 𝐵 ≠ ∅))
13	7, 12	mpbird 247	. 2 ⊢ (𝜑 → (𝐹 “ 𝐵) ≠ ∅)
14	6	simp3d 1075	. . . 4 ⊢ (𝜑 → ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 (𝑎 ∪ 𝑏) ⊆ 𝑐)
15		simplll 798	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑎 ⊆ 𝑐) → 𝜑)
16		simpr 477	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑎 ⊆ 𝑐) → 𝑎 ⊆ 𝑐)
17	9	ad2antrr 762	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → 𝐵 ⊆ 𝒫 𝐴)
18		simprr 796	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → 𝑐 ∈ 𝐵)
19	17, 18	sseldd 3604	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → 𝑐 ∈ 𝒫 𝐴)
20	19	elpwid 4170	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → 𝑐 ⊆ 𝐴)
21	20	adantr 481	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑎 ⊆ 𝑐) → 𝑐 ⊆ 𝐴)
22		vex 3203	. . . . . . . . . . . . 13 ⊢ 𝑎 ∈ V
23		vex 3203	. . . . . . . . . . . . 13 ⊢ 𝑐 ∈ V
24		sseq12 3628	. . . . . . . . . . . . . . . 16 ⊢ ((𝑢 = 𝑎 ∧ 𝑣 = 𝑐) → (𝑢 ⊆ 𝑣 ↔ 𝑎 ⊆ 𝑐))
25		sseq1 3626	. . . . . . . . . . . . . . . . 17 ⊢ (𝑣 = 𝑐 → (𝑣 ⊆ 𝐴 ↔ 𝑐 ⊆ 𝐴))
26	25	adantl 482	. . . . . . . . . . . . . . . 16 ⊢ ((𝑢 = 𝑎 ∧ 𝑣 = 𝑐) → (𝑣 ⊆ 𝐴 ↔ 𝑐 ⊆ 𝐴))
27	24, 26	anbi12d 747	. . . . . . . . . . . . . . 15 ⊢ ((𝑢 = 𝑎 ∧ 𝑣 = 𝑐) → ((𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴) ↔ (𝑎 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴)))
28	27	anbi2d 740	. . . . . . . . . . . . . 14 ⊢ ((𝑢 = 𝑎 ∧ 𝑣 = 𝑐) → ((𝜑 ∧ (𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴)) ↔ (𝜑 ∧ (𝑎 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴))))
29		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑢 = 𝑎 → (𝐹‘𝑢) = (𝐹‘𝑎))
30		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑣 = 𝑐 → (𝐹‘𝑣) = (𝐹‘𝑐))
31		sseq12 3628	. . . . . . . . . . . . . . 15 ⊢ (((𝐹‘𝑢) = (𝐹‘𝑎) ∧ (𝐹‘𝑣) = (𝐹‘𝑐)) → ((𝐹‘𝑢) ⊆ (𝐹‘𝑣) ↔ (𝐹‘𝑎) ⊆ (𝐹‘𝑐)))
32	29, 30, 31	syl2an 494	. . . . . . . . . . . . . 14 ⊢ ((𝑢 = 𝑎 ∧ 𝑣 = 𝑐) → ((𝐹‘𝑢) ⊆ (𝐹‘𝑣) ↔ (𝐹‘𝑎) ⊆ (𝐹‘𝑐)))
33	28, 32	imbi12d 334	. . . . . . . . . . . . 13 ⊢ ((𝑢 = 𝑎 ∧ 𝑣 = 𝑐) → (((𝜑 ∧ (𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴)) → (𝐹‘𝑢) ⊆ (𝐹‘𝑣)) ↔ ((𝜑 ∧ (𝑎 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴)) → (𝐹‘𝑎) ⊆ (𝐹‘𝑐))))
34		ipodrsima.m	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴)) → (𝐹‘𝑢) ⊆ (𝐹‘𝑣))
35	22, 23, 33, 34	vtocl2 3261	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑎 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴)) → (𝐹‘𝑎) ⊆ (𝐹‘𝑐))
36	15, 16, 21, 35	syl12anc 1324	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑎 ⊆ 𝑐) → (𝐹‘𝑎) ⊆ (𝐹‘𝑐))
37	36	ex 450	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → (𝑎 ⊆ 𝑐 → (𝐹‘𝑎) ⊆ (𝐹‘𝑐)))
38		simplll 798	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑏 ⊆ 𝑐) → 𝜑)
39		simpr 477	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑏 ⊆ 𝑐) → 𝑏 ⊆ 𝑐)
40	20	adantr 481	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑏 ⊆ 𝑐) → 𝑐 ⊆ 𝐴)
41		vex 3203	. . . . . . . . . . . . 13 ⊢ 𝑏 ∈ V
42		sseq12 3628	. . . . . . . . . . . . . . . 16 ⊢ ((𝑢 = 𝑏 ∧ 𝑣 = 𝑐) → (𝑢 ⊆ 𝑣 ↔ 𝑏 ⊆ 𝑐))
43	25	adantl 482	. . . . . . . . . . . . . . . 16 ⊢ ((𝑢 = 𝑏 ∧ 𝑣 = 𝑐) → (𝑣 ⊆ 𝐴 ↔ 𝑐 ⊆ 𝐴))
44	42, 43	anbi12d 747	. . . . . . . . . . . . . . 15 ⊢ ((𝑢 = 𝑏 ∧ 𝑣 = 𝑐) → ((𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴) ↔ (𝑏 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴)))
45	44	anbi2d 740	. . . . . . . . . . . . . 14 ⊢ ((𝑢 = 𝑏 ∧ 𝑣 = 𝑐) → ((𝜑 ∧ (𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴)) ↔ (𝜑 ∧ (𝑏 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴))))
46		fveq2 6191	. . . . . . . . . . . . . . 15 ⊢ (𝑢 = 𝑏 → (𝐹‘𝑢) = (𝐹‘𝑏))
47		sseq12 3628	. . . . . . . . . . . . . . 15 ⊢ (((𝐹‘𝑢) = (𝐹‘𝑏) ∧ (𝐹‘𝑣) = (𝐹‘𝑐)) → ((𝐹‘𝑢) ⊆ (𝐹‘𝑣) ↔ (𝐹‘𝑏) ⊆ (𝐹‘𝑐)))
48	46, 30, 47	syl2an 494	. . . . . . . . . . . . . 14 ⊢ ((𝑢 = 𝑏 ∧ 𝑣 = 𝑐) → ((𝐹‘𝑢) ⊆ (𝐹‘𝑣) ↔ (𝐹‘𝑏) ⊆ (𝐹‘𝑐)))
49	45, 48	imbi12d 334	. . . . . . . . . . . . 13 ⊢ ((𝑢 = 𝑏 ∧ 𝑣 = 𝑐) → (((𝜑 ∧ (𝑢 ⊆ 𝑣 ∧ 𝑣 ⊆ 𝐴)) → (𝐹‘𝑢) ⊆ (𝐹‘𝑣)) ↔ ((𝜑 ∧ (𝑏 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴)) → (𝐹‘𝑏) ⊆ (𝐹‘𝑐))))
50	41, 23, 49, 34	vtocl2 3261	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑐 ∧ 𝑐 ⊆ 𝐴)) → (𝐹‘𝑏) ⊆ (𝐹‘𝑐))
51	38, 39, 40, 50	syl12anc 1324	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) ∧ 𝑏 ⊆ 𝑐) → (𝐹‘𝑏) ⊆ (𝐹‘𝑐))
52	51	ex 450	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → (𝑏 ⊆ 𝑐 → (𝐹‘𝑏) ⊆ (𝐹‘𝑐)))
53	37, 52	anim12d 586	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → ((𝑎 ⊆ 𝑐 ∧ 𝑏 ⊆ 𝑐) → ((𝐹‘𝑎) ⊆ (𝐹‘𝑐) ∧ (𝐹‘𝑏) ⊆ (𝐹‘𝑐))))
54		unss 3787	. . . . . . . . 9 ⊢ ((𝑎 ⊆ 𝑐 ∧ 𝑏 ⊆ 𝑐) ↔ (𝑎 ∪ 𝑏) ⊆ 𝑐)
55		unss 3787	. . . . . . . . 9 ⊢ (((𝐹‘𝑎) ⊆ (𝐹‘𝑐) ∧ (𝐹‘𝑏) ⊆ (𝐹‘𝑐)) ↔ ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐))
56	53, 54, 55	3imtr3g 284	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ (𝑏 ∈ 𝐵 ∧ 𝑐 ∈ 𝐵)) → ((𝑎 ∪ 𝑏) ⊆ 𝑐 → ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
57	56	anassrs 680	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐵) ∧ 𝑐 ∈ 𝐵) → ((𝑎 ∪ 𝑏) ⊆ 𝑐 → ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
58	57	reximdva 3017	. . . . . 6 ⊢ (((𝜑 ∧ 𝑎 ∈ 𝐵) ∧ 𝑏 ∈ 𝐵) → (∃𝑐 ∈ 𝐵 (𝑎 ∪ 𝑏) ⊆ 𝑐 → ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
59	58	ralimdva 2962	. . . . 5 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐵) → (∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 (𝑎 ∪ 𝑏) ⊆ 𝑐 → ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
60	59	ralimdva 2962	. . . 4 ⊢ (𝜑 → (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 (𝑎 ∪ 𝑏) ⊆ 𝑐 → ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
61	14, 60	mpd 15	. . 3 ⊢ (𝜑 → ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐))
62		uneq1 3760	. . . . . . . . 9 ⊢ (𝑥 = (𝐹‘𝑎) → (𝑥 ∪ 𝑦) = ((𝐹‘𝑎) ∪ 𝑦))
63	62	sseq1d 3632	. . . . . . . 8 ⊢ (𝑥 = (𝐹‘𝑎) → ((𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ ((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧))
64	63	rexbidv 3052	. . . . . . 7 ⊢ (𝑥 = (𝐹‘𝑎) → (∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ ∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧))
65	64	ralbidv 2986	. . . . . 6 ⊢ (𝑥 = (𝐹‘𝑎) → (∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧))
66	65	ralima 6498	. . . . 5 ⊢ ((𝐹 Fn 𝒫 𝐴 ∧ 𝐵 ⊆ 𝒫 𝐴) → (∀𝑥 ∈ (𝐹 “ 𝐵)∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑎 ∈ 𝐵 ∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧))
67	8, 9, 66	syl2anc 693	. . . 4 ⊢ (𝜑 → (∀𝑥 ∈ (𝐹 “ 𝐵)∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑎 ∈ 𝐵 ∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧))
68		uneq2 3761	. . . . . . . . . 10 ⊢ (𝑦 = (𝐹‘𝑏) → ((𝐹‘𝑎) ∪ 𝑦) = ((𝐹‘𝑎) ∪ (𝐹‘𝑏)))
69	68	sseq1d 3632	. . . . . . . . 9 ⊢ (𝑦 = (𝐹‘𝑏) → (((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧 ↔ ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧))
70	69	rexbidv 3052	. . . . . . . 8 ⊢ (𝑦 = (𝐹‘𝑏) → (∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧 ↔ ∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧))
71	70	ralima 6498	. . . . . . 7 ⊢ ((𝐹 Fn 𝒫 𝐴 ∧ 𝐵 ⊆ 𝒫 𝐴) → (∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑏 ∈ 𝐵 ∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧))
72	8, 9, 71	syl2anc 693	. . . . . 6 ⊢ (𝜑 → (∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑏 ∈ 𝐵 ∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧))
73		sseq2 3627	. . . . . . . . 9 ⊢ (𝑧 = (𝐹‘𝑐) → (((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧 ↔ ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
74	73	rexima 6497	. . . . . . . 8 ⊢ ((𝐹 Fn 𝒫 𝐴 ∧ 𝐵 ⊆ 𝒫 𝐴) → (∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧 ↔ ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
75	8, 9, 74	syl2anc 693	. . . . . . 7 ⊢ (𝜑 → (∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧 ↔ ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
76	75	ralbidv 2986	. . . . . 6 ⊢ (𝜑 → (∀𝑏 ∈ 𝐵 ∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ 𝑧 ↔ ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
77	72, 76	bitrd 268	. . . . 5 ⊢ (𝜑 → (∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
78	77	ralbidv 2986	. . . 4 ⊢ (𝜑 → (∀𝑎 ∈ 𝐵 ∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)((𝐹‘𝑎) ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
79	67, 78	bitrd 268	. . 3 ⊢ (𝜑 → (∀𝑥 ∈ (𝐹 “ 𝐵)∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧 ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ∃𝑐 ∈ 𝐵 ((𝐹‘𝑎) ∪ (𝐹‘𝑏)) ⊆ (𝐹‘𝑐)))
80	61, 79	mpbird 247	. 2 ⊢ (𝜑 → ∀𝑥 ∈ (𝐹 “ 𝐵)∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧)
81		isipodrs 17161	. 2 ⊢ ((toInc‘(𝐹 “ 𝐵)) ∈ Dirset ↔ ((𝐹 “ 𝐵) ∈ V ∧ (𝐹 “ 𝐵) ≠ ∅ ∧ ∀𝑥 ∈ (𝐹 “ 𝐵)∀𝑦 ∈ (𝐹 “ 𝐵)∃𝑧 ∈ (𝐹 “ 𝐵)(𝑥 ∪ 𝑦) ⊆ 𝑧))
82	3, 13, 80, 81	syl3anbrc 1246	1 ⊢ (𝜑 → (toInc‘(𝐹 “ 𝐵)) ∈ Dirset)

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990   ≠ wne 2794  ∀wral 2912  ∃wrex 2913  Vcvv 3200   ∪ cun 3572   ⊆ wss 3574  ∅c0 3915  𝒫 cpw 4158   “ cima 5117   Fn wfn 5883  ‘cfv 5888  Dirsetcdrs 16927  toInccipo 17151

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-3 11080  df-4 11081  df-5 11082  df-6 11083  df-7 11084  df-8 11085  df-9 11086  df-n0 11293  df-z 11378  df-dec 11494  df-uz 11688  df-fz 12327  df-struct 15859  df-ndx 15860  df-slot 15861  df-base 15863  df-tset 15960  df-ple 15961  df-ocomp 15963  df-preset 16928  df-drs 16929  df-poset 16946  df-ipo 17152

This theorem is referenced by:  isacs4lem  17168  isnacs3  37273