Theorem upgrex 29071

Description: An edge is an unordered pair of vertices. (Contributed by Mario Carneiro, 11-Mar-2015.) (Revised by AV, 10-Oct-2020.)

Hypotheses

Ref	Expression
isupgr.v	⊢ 𝑉 = (Vtx‘𝐺)
isupgr.e	⊢ 𝐸 = (iEdg‘𝐺)

Assertion

Ref	Expression
upgrex	⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → ∃𝑥 ∈ 𝑉 ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})

Distinct variable groups:   𝑥,𝐺   𝑥,𝑉   𝑥,𝐸   𝑥,𝐹   𝑥,𝐴,𝑦   𝑦,𝐸   𝑦,𝐹   𝑦,𝐺   𝑦,𝑉

Proof of Theorem upgrex

Step	Hyp	Ref	Expression
1		isupgr.v	. . . . 5 ⊢ 𝑉 = (Vtx‘𝐺)
2		isupgr.e	. . . . 5 ⊢ 𝐸 = (iEdg‘𝐺)
3	1, 2	upgrn0 29068	. . . 4 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (𝐸‘𝐹) ≠ ∅)
4		n0 4328	. . . 4 ⊢ ((𝐸‘𝐹) ≠ ∅ ↔ ∃𝑥 𝑥 ∈ (𝐸‘𝐹))
5	3, 4	sylib 218	. . 3 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → ∃𝑥 𝑥 ∈ (𝐸‘𝐹))
6		simp1 1136	. . . . . . . 8 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → 𝐺 ∈ UPGraph)
7		fndm 6641	. . . . . . . . . . . . 13 ⊢ (𝐸 Fn 𝐴 → dom 𝐸 = 𝐴)
8	7	eqcomd 2741	. . . . . . . . . . . 12 ⊢ (𝐸 Fn 𝐴 → 𝐴 = dom 𝐸)
9	8	eleq2d 2820	. . . . . . . . . . 11 ⊢ (𝐸 Fn 𝐴 → (𝐹 ∈ 𝐴 ↔ 𝐹 ∈ dom 𝐸))
10	9	biimpd 229	. . . . . . . . . 10 ⊢ (𝐸 Fn 𝐴 → (𝐹 ∈ 𝐴 → 𝐹 ∈ dom 𝐸))
11	10	a1i 11	. . . . . . . . 9 ⊢ (𝐺 ∈ UPGraph → (𝐸 Fn 𝐴 → (𝐹 ∈ 𝐴 → 𝐹 ∈ dom 𝐸)))
12	11	3imp 1110	. . . . . . . 8 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → 𝐹 ∈ dom 𝐸)
13	1, 2	upgrss 29067	. . . . . . . 8 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐹 ∈ dom 𝐸) → (𝐸‘𝐹) ⊆ 𝑉)
14	6, 12, 13	syl2anc 584	. . . . . . 7 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (𝐸‘𝐹) ⊆ 𝑉)
15	14	sselda 3958	. . . . . 6 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → 𝑥 ∈ 𝑉)
16	15	adantr 480	. . . . . . . 8 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) = ∅) → 𝑥 ∈ 𝑉)
17		simpr 484	. . . . . . . . . 10 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) = ∅) → ((𝐸‘𝐹) ∖ {𝑥}) = ∅)
18		ssdif0 4341	. . . . . . . . . 10 ⊢ ((𝐸‘𝐹) ⊆ {𝑥} ↔ ((𝐸‘𝐹) ∖ {𝑥}) = ∅)
19	17, 18	sylibr 234	. . . . . . . . 9 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) = ∅) → (𝐸‘𝐹) ⊆ {𝑥})
20		simpr 484	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → 𝑥 ∈ (𝐸‘𝐹))
21	20	snssd 4785	. . . . . . . . . 10 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → {𝑥} ⊆ (𝐸‘𝐹))
22	21	adantr 480	. . . . . . . . 9 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) = ∅) → {𝑥} ⊆ (𝐸‘𝐹))
23	19, 22	eqssd 3976	. . . . . . . 8 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) = ∅) → (𝐸‘𝐹) = {𝑥})
24		preq2 4710	. . . . . . . . . 10 ⊢ (𝑦 = 𝑥 → {𝑥, 𝑦} = {𝑥, 𝑥})
25		dfsn2 4614	. . . . . . . . . 10 ⊢ {𝑥} = {𝑥, 𝑥}
26	24, 25	eqtr4di 2788	. . . . . . . . 9 ⊢ (𝑦 = 𝑥 → {𝑥, 𝑦} = {𝑥})
27	26	rspceeqv 3624	. . . . . . . 8 ⊢ ((𝑥 ∈ 𝑉 ∧ (𝐸‘𝐹) = {𝑥}) → ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})
28	16, 23, 27	syl2anc 584	. . . . . . 7 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) = ∅) → ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})
29		n0 4328	. . . . . . . 8 ⊢ (((𝐸‘𝐹) ∖ {𝑥}) ≠ ∅ ↔ ∃𝑦 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))
30	14	adantr 480	. . . . . . . . . . . . . 14 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (𝐸‘𝐹) ⊆ 𝑉)
31		simprr 772	. . . . . . . . . . . . . . 15 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))
32	31	eldifad 3938	. . . . . . . . . . . . . 14 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → 𝑦 ∈ (𝐸‘𝐹))
33	30, 32	sseldd 3959	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → 𝑦 ∈ 𝑉)
34	1, 2	upgrfi 29070	. . . . . . . . . . . . . . . 16 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (𝐸‘𝐹) ∈ Fin)
35	34	adantr 480	. . . . . . . . . . . . . . 15 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (𝐸‘𝐹) ∈ Fin)
36		simprl 770	. . . . . . . . . . . . . . . 16 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → 𝑥 ∈ (𝐸‘𝐹))
37	36, 32	prssd 4798	. . . . . . . . . . . . . . 15 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → {𝑥, 𝑦} ⊆ (𝐸‘𝐹))
38		fvex 6889	. . . . . . . . . . . . . . . . 17 ⊢ (𝐸‘𝐹) ∈ V
39		ssdomg 9014	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐸‘𝐹) ∈ V → ({𝑥, 𝑦} ⊆ (𝐸‘𝐹) → {𝑥, 𝑦} ≼ (𝐸‘𝐹)))
40	38, 37, 39	mpsyl 68	. . . . . . . . . . . . . . . 16 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → {𝑥, 𝑦} ≼ (𝐸‘𝐹))
41	1, 2	upgrle 29069	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (♯‘(𝐸‘𝐹)) ≤ 2)
42	41	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (♯‘(𝐸‘𝐹)) ≤ 2)
43		eldifsni 4766	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}) → 𝑦 ≠ 𝑥)
44	43	ad2antll 729	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → 𝑦 ≠ 𝑥)
45	44	necomd 2987	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → 𝑥 ≠ 𝑦)
46		hashprg 14413	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑥 ∈ V ∧ 𝑦 ∈ V) → (𝑥 ≠ 𝑦 ↔ (♯‘{𝑥, 𝑦}) = 2))
47	46	el2v 3466	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 ≠ 𝑦 ↔ (♯‘{𝑥, 𝑦}) = 2)
48	45, 47	sylib 218	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (♯‘{𝑥, 𝑦}) = 2)
49	42, 48	breqtrrd 5147	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (♯‘(𝐸‘𝐹)) ≤ (♯‘{𝑥, 𝑦}))
50		prfi 9335	. . . . . . . . . . . . . . . . . 18 ⊢ {𝑥, 𝑦} ∈ Fin
51		hashdom 14397	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐸‘𝐹) ∈ Fin ∧ {𝑥, 𝑦} ∈ Fin) → ((♯‘(𝐸‘𝐹)) ≤ (♯‘{𝑥, 𝑦}) ↔ (𝐸‘𝐹) ≼ {𝑥, 𝑦}))
52	35, 50, 51	sylancl 586	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → ((♯‘(𝐸‘𝐹)) ≤ (♯‘{𝑥, 𝑦}) ↔ (𝐸‘𝐹) ≼ {𝑥, 𝑦}))
53	49, 52	mpbid 232	. . . . . . . . . . . . . . . 16 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (𝐸‘𝐹) ≼ {𝑥, 𝑦})
54		sbth 9107	. . . . . . . . . . . . . . . 16 ⊢ (({𝑥, 𝑦} ≼ (𝐸‘𝐹) ∧ (𝐸‘𝐹) ≼ {𝑥, 𝑦}) → {𝑥, 𝑦} ≈ (𝐸‘𝐹))
55	40, 53, 54	syl2anc 584	. . . . . . . . . . . . . . 15 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → {𝑥, 𝑦} ≈ (𝐸‘𝐹))
56		fisseneq 9265	. . . . . . . . . . . . . . 15 ⊢ (((𝐸‘𝐹) ∈ Fin ∧ {𝑥, 𝑦} ⊆ (𝐸‘𝐹) ∧ {𝑥, 𝑦} ≈ (𝐸‘𝐹)) → {𝑥, 𝑦} = (𝐸‘𝐹))
57	35, 37, 55, 56	syl3anc 1373	. . . . . . . . . . . . . 14 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → {𝑥, 𝑦} = (𝐸‘𝐹))
58	57	eqcomd 2741	. . . . . . . . . . . . 13 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (𝐸‘𝐹) = {𝑥, 𝑦})
59	33, 58	jca 511	. . . . . . . . . . . 12 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ (𝑥 ∈ (𝐸‘𝐹) ∧ 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}))) → (𝑦 ∈ 𝑉 ∧ (𝐸‘𝐹) = {𝑥, 𝑦}))
60	59	expr 456	. . . . . . . . . . 11 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → (𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}) → (𝑦 ∈ 𝑉 ∧ (𝐸‘𝐹) = {𝑥, 𝑦})))
61	60	eximdv 1917	. . . . . . . . . 10 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → (∃𝑦 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥}) → ∃𝑦(𝑦 ∈ 𝑉 ∧ (𝐸‘𝐹) = {𝑥, 𝑦})))
62	61	imp 406	. . . . . . . . 9 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ∃𝑦 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥})) → ∃𝑦(𝑦 ∈ 𝑉 ∧ (𝐸‘𝐹) = {𝑥, 𝑦}))
63		df-rex 3061	. . . . . . . . 9 ⊢ (∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦} ↔ ∃𝑦(𝑦 ∈ 𝑉 ∧ (𝐸‘𝐹) = {𝑥, 𝑦}))
64	62, 63	sylibr 234	. . . . . . . 8 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ∃𝑦 𝑦 ∈ ((𝐸‘𝐹) ∖ {𝑥})) → ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})
65	29, 64	sylan2b 594	. . . . . . 7 ⊢ ((((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) ∧ ((𝐸‘𝐹) ∖ {𝑥}) ≠ ∅) → ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})
66	28, 65	pm2.61dane 3019	. . . . . 6 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})
67	15, 66	jca 511	. . . . 5 ⊢ (((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) ∧ 𝑥 ∈ (𝐸‘𝐹)) → (𝑥 ∈ 𝑉 ∧ ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦}))
68	67	ex 412	. . . 4 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (𝑥 ∈ (𝐸‘𝐹) → (𝑥 ∈ 𝑉 ∧ ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})))
69	68	eximdv 1917	. . 3 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → (∃𝑥 𝑥 ∈ (𝐸‘𝐹) → ∃𝑥(𝑥 ∈ 𝑉 ∧ ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})))
70	5, 69	mpd 15	. 2 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → ∃𝑥(𝑥 ∈ 𝑉 ∧ ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦}))
71		df-rex 3061	. 2 ⊢ (∃𝑥 ∈ 𝑉 ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦} ↔ ∃𝑥(𝑥 ∈ 𝑉 ∧ ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦}))
72	70, 71	sylibr 234	1 ⊢ ((𝐺 ∈ UPGraph ∧ 𝐸 Fn 𝐴 ∧ 𝐹 ∈ 𝐴) → ∃𝑥 ∈ 𝑉 ∃𝑦 ∈ 𝑉 (𝐸‘𝐹) = {𝑥, 𝑦})

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540  ∃wex 1779   ∈ wcel 2108   ≠ wne 2932  ∃wrex 3060  Vcvv 3459   ∖ cdif 3923   ⊆ wss 3926  ∅c0 4308  {csn 4601  {cpr 4603   class class class wbr 5119  dom cdm 5654   Fn wfn 6526  ‘cfv 6531   ≈ cen 8956   ≼ cdom 8957  Fincfn 8959   ≤ cle 11270  2c2 12295  ♯chash 14348  Vtxcvtx 28975  iEdgciedg 28976  UPGraphcupgr 29059

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-sep 5266  ax-nul 5276  ax-pow 5335  ax-pr 5402  ax-un 7729  ax-cnex 11185  ax-resscn 11186  ax-1cn 11187  ax-icn 11188  ax-addcl 11189  ax-addrcl 11190  ax-mulcl 11191  ax-mulrcl 11192  ax-mulcom 11193  ax-addass 11194  ax-mulass 11195  ax-distr 11196  ax-i2m1 11197  ax-1ne0 11198  ax-1rid 11199  ax-rnegex 11200  ax-rrecex 11201  ax-cnre 11202  ax-pre-lttri 11203  ax-pre-lttrn 11204  ax-pre-ltadd 11205  ax-pre-mulgt0 11206

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3061  df-reu 3360  df-rab 3416  df-v 3461  df-sbc 3766  df-csb 3875  df-dif 3929  df-un 3931  df-in 3933  df-ss 3943  df-pss 3946  df-nul 4309  df-if 4501  df-pw 4577  df-sn 4602  df-pr 4604  df-op 4608  df-uni 4884  df-int 4923  df-iun 4969  df-br 5120  df-opab 5182  df-mpt 5202  df-tr 5230  df-id 5548  df-eprel 5553  df-po 5561  df-so 5562  df-fr 5606  df-we 5608  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-pred 6290  df-ord 6355  df-on 6356  df-lim 6357  df-suc 6358  df-iota 6484  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-riota 7362  df-ov 7408  df-oprab 7409  df-mpo 7410  df-om 7862  df-1st 7988  df-2nd 7989  df-frecs 8280  df-wrecs 8311  df-recs 8385  df-rdg 8424  df-1o 8480  df-2o 8481  df-oadd 8484  df-er 8719  df-en 8960  df-dom 8961  df-sdom 8962  df-fin 8963  df-dju 9915  df-card 9953  df-pnf 11271  df-mnf 11272  df-xr 11273  df-ltxr 11274  df-le 11275  df-sub 11468  df-neg 11469  df-nn 12241  df-2 12303  df-n0 12502  df-xnn0 12575  df-z 12589  df-uz 12853  df-fz 13525  df-hash 14349  df-upgr 29061

This theorem is referenced by: (None)