Theorem isomuspgrlem2b 44001

Description: Lemma 2 for isomuspgrlem2 44005. (Contributed by AV, 29-Nov-2022.)

Hypotheses

Ref	Expression
isomushgr.v	⊢ 𝑉 = (Vtx‘𝐴)
isomushgr.w	⊢ 𝑊 = (Vtx‘𝐵)
isomushgr.e	⊢ 𝐸 = (Edg‘𝐴)
isomushgr.k	⊢ 𝐾 = (Edg‘𝐵)
isomuspgrlem2.g	⊢ 𝐺 = (𝑥 ∈ 𝐸 ↦ (𝐹 “ 𝑥))
isomuspgrlem2.a	⊢ (𝜑 → 𝐴 ∈ USPGraph)
isomuspgrlem2.f	⊢ (𝜑 → 𝐹:𝑉–1-1-onto→𝑊)
isomuspgrlem2.i	⊢ (𝜑 → ∀𝑎 ∈ 𝑉 ∀𝑏 ∈ 𝑉 ({𝑎, 𝑏} ∈ 𝐸 ↔ {(𝐹‘𝑎), (𝐹‘𝑏)} ∈ 𝐾))

Assertion

Ref	Expression
isomuspgrlem2b	⊢ (𝜑 → 𝐺:𝐸⟶𝐾)

Distinct variable groups:   𝑎,𝑏,𝑥   𝑥,𝐴   𝑥,𝐵   𝑥,𝐸   𝑥,𝐾   𝑥,𝑉   𝑥,𝑊   𝑥,𝐹   𝐸,𝑎,𝑏   𝐹,𝑎,𝑏   𝐾,𝑎,𝑏   𝑉,𝑎,𝑏   𝜑,𝑥

Allowed substitution hints:   𝜑(𝑎,𝑏)   𝐴(𝑎,𝑏)   𝐵(𝑎,𝑏)   𝐺(𝑥,𝑎,𝑏)   𝑊(𝑎,𝑏)

Proof of Theorem isomuspgrlem2b

Dummy variables 𝑐 𝑑 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		isomuspgrlem2.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ USPGraph)
2		uspgrupgr 26964	. . . . . 6 ⊢ (𝐴 ∈ USPGraph → 𝐴 ∈ UPGraph)
3	1, 2	syl 17	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ UPGraph)
4		isomushgr.v	. . . . . 6 ⊢ 𝑉 = (Vtx‘𝐴)
5		isomushgr.e	. . . . . 6 ⊢ 𝐸 = (Edg‘𝐴)
6	4, 5	upgredg 26925	. . . . 5 ⊢ ((𝐴 ∈ UPGraph ∧ 𝑥 ∈ 𝐸) → ∃𝑐 ∈ 𝑉 ∃𝑑 ∈ 𝑉 𝑥 = {𝑐, 𝑑})
7	3, 6	sylan 582	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐸) → ∃𝑐 ∈ 𝑉 ∃𝑑 ∈ 𝑉 𝑥 = {𝑐, 𝑑})
8		isomuspgrlem2.i	. . . . . . . . . . . . 13 ⊢ (𝜑 → ∀𝑎 ∈ 𝑉 ∀𝑏 ∈ 𝑉 ({𝑎, 𝑏} ∈ 𝐸 ↔ {(𝐹‘𝑎), (𝐹‘𝑏)} ∈ 𝐾))
9		preq12 4674	. . . . . . . . . . . . . . . 16 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → {𝑎, 𝑏} = {𝑐, 𝑑})
10	9	eleq1d 2900	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → ({𝑎, 𝑏} ∈ 𝐸 ↔ {𝑐, 𝑑} ∈ 𝐸))
11		fveq2 6673	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑎 = 𝑐 → (𝐹‘𝑎) = (𝐹‘𝑐))
12	11	adantr 483	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → (𝐹‘𝑎) = (𝐹‘𝑐))
13		fveq2 6673	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑏 = 𝑑 → (𝐹‘𝑏) = (𝐹‘𝑑))
14	13	adantl 484	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → (𝐹‘𝑏) = (𝐹‘𝑑))
15	12, 14	preq12d 4680	. . . . . . . . . . . . . . . 16 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → {(𝐹‘𝑎), (𝐹‘𝑏)} = {(𝐹‘𝑐), (𝐹‘𝑑)})
16	15	eleq1d 2900	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → ({(𝐹‘𝑎), (𝐹‘𝑏)} ∈ 𝐾 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾))
17	10, 16	bibi12d 348	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝑐 ∧ 𝑏 = 𝑑) → (({𝑎, 𝑏} ∈ 𝐸 ↔ {(𝐹‘𝑎), (𝐹‘𝑏)} ∈ 𝐾) ↔ ({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾)))
18	17	rspc2gv 3635	. . . . . . . . . . . . 13 ⊢ ((𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉) → (∀𝑎 ∈ 𝑉 ∀𝑏 ∈ 𝑉 ({𝑎, 𝑏} ∈ 𝐸 ↔ {(𝐹‘𝑎), (𝐹‘𝑏)} ∈ 𝐾) → ({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾)))
19	8, 18	syl5com 31	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉) → ({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾)))
20	19	adantr 483	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) → ((𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉) → ({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾)))
21	20	imp 409	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → ({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾))
22		bicom 224	. . . . . . . . . . . . 13 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾) ↔ ({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 ↔ {𝑐, 𝑑} ∈ 𝐸))
23		bianir 1053	. . . . . . . . . . . . . 14 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ∧ ({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 ↔ {𝑐, 𝑑} ∈ 𝐸)) → {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾)
24	23	ex 415	. . . . . . . . . . . . 13 ⊢ ({𝑐, 𝑑} ∈ 𝐸 → (({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 ↔ {𝑐, 𝑑} ∈ 𝐸) → {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾))
25	22, 24	syl5bi 244	. . . . . . . . . . . 12 ⊢ ({𝑐, 𝑑} ∈ 𝐸 → (({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾) → {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾))
26		isomuspgrlem2.f	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝜑 → 𝐹:𝑉–1-1-onto→𝑊)
27		f1ofn 6619	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝐹:𝑉–1-1-onto→𝑊 → 𝐹 Fn 𝑉)
28	26, 27	syl 17	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝜑 → 𝐹 Fn 𝑉)
29	28	adantr 483	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) → 𝐹 Fn 𝑉)
30	29	adantr 483	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → 𝐹 Fn 𝑉)
31		simprl 769	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → 𝑐 ∈ 𝑉)
32		simprr 771	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → 𝑑 ∈ 𝑉)
33	30, 31, 32	3jca 1124	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → (𝐹 Fn 𝑉 ∧ 𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))
34	33	adantl 484	. . . . . . . . . . . . . . . . . 18 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ∧ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))) → (𝐹 Fn 𝑉 ∧ 𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))
35		fnimapr 6750	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐹 Fn 𝑉 ∧ 𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉) → (𝐹 “ {𝑐, 𝑑}) = {(𝐹‘𝑐), (𝐹‘𝑑)})
36	34, 35	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ∧ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))) → (𝐹 “ {𝑐, 𝑑}) = {(𝐹‘𝑐), (𝐹‘𝑑)})
37	36	eqcomd 2830	. . . . . . . . . . . . . . . 16 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ∧ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))) → {(𝐹‘𝑐), (𝐹‘𝑑)} = (𝐹 “ {𝑐, 𝑑}))
38	37	eleq1d 2900	. . . . . . . . . . . . . . 15 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ∧ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))) → ({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 ↔ (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾))
39	38	biimpd 231	. . . . . . . . . . . . . 14 ⊢ (({𝑐, 𝑑} ∈ 𝐸 ∧ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉))) → ({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾))
40	39	ex 415	. . . . . . . . . . . . 13 ⊢ ({𝑐, 𝑑} ∈ 𝐸 → (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → ({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
41	40	com23 86	. . . . . . . . . . . 12 ⊢ ({𝑐, 𝑑} ∈ 𝐸 → ({(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾 → (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
42	25, 41	syld 47	. . . . . . . . . . 11 ⊢ ({𝑐, 𝑑} ∈ 𝐸 → (({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾) → (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
43	42	com13 88	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → (({𝑐, 𝑑} ∈ 𝐸 ↔ {(𝐹‘𝑐), (𝐹‘𝑑)} ∈ 𝐾) → ({𝑐, 𝑑} ∈ 𝐸 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
44	21, 43	mpd 15	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → ({𝑐, 𝑑} ∈ 𝐸 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾))
45		eleq1 2903	. . . . . . . . . . . 12 ⊢ (𝑥 = {𝑐, 𝑑} → (𝑥 ∈ 𝐸 ↔ {𝑐, 𝑑} ∈ 𝐸))
46		imaeq2 5928	. . . . . . . . . . . . 13 ⊢ (𝑥 = {𝑐, 𝑑} → (𝐹 “ 𝑥) = (𝐹 “ {𝑐, 𝑑}))
47	46	eleq1d 2900	. . . . . . . . . . . 12 ⊢ (𝑥 = {𝑐, 𝑑} → ((𝐹 “ 𝑥) ∈ 𝐾 ↔ (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾))
48	45, 47	imbi12d 347	. . . . . . . . . . 11 ⊢ (𝑥 = {𝑐, 𝑑} → ((𝑥 ∈ 𝐸 → (𝐹 “ 𝑥) ∈ 𝐾) ↔ ({𝑐, 𝑑} ∈ 𝐸 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
49	48	adantl 484	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) → ((𝑥 ∈ 𝐸 → (𝐹 “ 𝑥) ∈ 𝐾) ↔ ({𝑐, 𝑑} ∈ 𝐸 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
50	49	adantr 483	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → ((𝑥 ∈ 𝐸 → (𝐹 “ 𝑥) ∈ 𝐾) ↔ ({𝑐, 𝑑} ∈ 𝐸 → (𝐹 “ {𝑐, 𝑑}) ∈ 𝐾)))
51	44, 50	mpbird 259	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 = {𝑐, 𝑑}) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → (𝑥 ∈ 𝐸 → (𝐹 “ 𝑥) ∈ 𝐾))
52	51	exp31 422	. . . . . . 7 ⊢ (𝜑 → (𝑥 = {𝑐, 𝑑} → ((𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉) → (𝑥 ∈ 𝐸 → (𝐹 “ 𝑥) ∈ 𝐾))))
53	52	com24 95	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ 𝐸 → ((𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉) → (𝑥 = {𝑐, 𝑑} → (𝐹 “ 𝑥) ∈ 𝐾))))
54	53	imp31 420	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐸) ∧ (𝑐 ∈ 𝑉 ∧ 𝑑 ∈ 𝑉)) → (𝑥 = {𝑐, 𝑑} → (𝐹 “ 𝑥) ∈ 𝐾))
55	54	rexlimdvva 3297	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐸) → (∃𝑐 ∈ 𝑉 ∃𝑑 ∈ 𝑉 𝑥 = {𝑐, 𝑑} → (𝐹 “ 𝑥) ∈ 𝐾))
56	7, 55	mpd 15	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐸) → (𝐹 “ 𝑥) ∈ 𝐾)
57	56	ralrimiva 3185	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐸 (𝐹 “ 𝑥) ∈ 𝐾)
58		isomuspgrlem2.g	. . 3 ⊢ 𝐺 = (𝑥 ∈ 𝐸 ↦ (𝐹 “ 𝑥))
59	58	fmpt 6877	. 2 ⊢ (∀𝑥 ∈ 𝐸 (𝐹 “ 𝑥) ∈ 𝐾 ↔ 𝐺:𝐸⟶𝐾)
60	57, 59	sylib 220	1 ⊢ (𝜑 → 𝐺:𝐸⟶𝐾)

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   ∧ w3a 1083   = wceq 1536   ∈ wcel 2113  ∀wral 3141  ∃wrex 3142  {cpr 4572   ↦ cmpt 5149   “ cima 5561   Fn wfn 6353  ⟶wf 6354  –1-1-onto→wf1o 6357  ‘cfv 6358  Vtxcvtx 26784  Edgcedg 26835  UPGraphcupgr 26868  USPGraphcuspgr 26936

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 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2796  ax-rep 5193  ax-sep 5206  ax-nul 5213  ax-pow 5269  ax-pr 5333  ax-un 7464  ax-cnex 10596  ax-resscn 10597  ax-1cn 10598  ax-icn 10599  ax-addcl 10600  ax-addrcl 10601  ax-mulcl 10602  ax-mulrcl 10603  ax-mulcom 10604  ax-addass 10605  ax-mulass 10606  ax-distr 10607  ax-i2m1 10608  ax-1ne0 10609  ax-1rid 10610  ax-rnegex 10611  ax-rrecex 10612  ax-cnre 10613  ax-pre-lttri 10614  ax-pre-lttrn 10615  ax-pre-ltadd 10616  ax-pre-mulgt0 10617

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2966  df-ne 3020  df-nel 3127  df-ral 3146  df-rex 3147  df-reu 3148  df-rmo 3149  df-rab 3150  df-v 3499  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-pss 3957  df-nul 4295  df-if 4471  df-pw 4544  df-sn 4571  df-pr 4573  df-tp 4575  df-op 4577  df-uni 4842  df-int 4880  df-iun 4924  df-br 5070  df-opab 5132  df-mpt 5150  df-tr 5176  df-id 5463  df-eprel 5468  df-po 5477  df-so 5478  df-fr 5517  df-we 5519  df-xp 5564  df-rel 5565  df-cnv 5566  df-co 5567  df-dm 5568  df-rn 5569  df-res 5570  df-ima 5571  df-pred 6151  df-ord 6197  df-on 6198  df-lim 6199  df-suc 6200  df-iota 6317  df-fun 6360  df-fn 6361  df-f 6362  df-f1 6363  df-fo 6364  df-f1o 6365  df-fv 6366  df-riota 7117  df-ov 7162  df-oprab 7163  df-mpo 7164  df-om 7584  df-1st 7692  df-2nd 7693  df-wrecs 7950  df-recs 8011  df-rdg 8049  df-1o 8105  df-2o 8106  df-oadd 8109  df-er 8292  df-en 8513  df-dom 8514  df-sdom 8515  df-fin 8516  df-dju 9333  df-card 9371  df-pnf 10680  df-mnf 10681  df-xr 10682  df-ltxr 10683  df-le 10684  df-sub 10875  df-neg 10876  df-nn 11642  df-2 11703  df-n0 11901  df-xnn0 11971  df-z 11985  df-uz 12247  df-fz 12896  df-hash 13694  df-edg 26836  df-upgr 26870  df-uspgr 26938

This theorem is referenced by:  isomuspgrlem2c  44002  isomuspgrlem2d  44003