Theorem upgrpredgv 15996

Description: An edge of a pseudograph always connects two vertices if the edge contains two sets. The two vertices/sets need not necessarily be different (loops are allowed). (Contributed by AV, 18-Nov-2021.)

Hypotheses

Ref	Expression
upgredg.v	⊢ 𝑉 = (Vtx‘𝐺)
upgredg.e	⊢ 𝐸 = (Edg‘𝐺)

Assertion

Ref	Expression
upgrpredgv	⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉))

Proof of Theorem upgrpredgv

Dummy variables 𝑚 𝑛 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		upgredg.v	. . . 4 ⊢ 𝑉 = (Vtx‘𝐺)
2		upgredg.e	. . . 4 ⊢ 𝐸 = (Edg‘𝐺)
3	1, 2	upgredg 15994	. . 3 ⊢ ((𝐺 ∈ UPGraph ∧ {𝑀, 𝑁} ∈ 𝐸) → ∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛})
4	3	3adant2 1042	. 2 ⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → ∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛})
5		preq12bg 3856	. . . . 5 ⊢ (((𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ (𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉)) → ({𝑀, 𝑁} = {𝑚, 𝑛} ↔ ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚))))
6	5	3ad2antl2 1186	. . . 4 ⊢ (((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) ∧ (𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉)) → ({𝑀, 𝑁} = {𝑚, 𝑛} ↔ ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚))))
7		eleq1 2294	. . . . . . . . . 10 ⊢ (𝑚 = 𝑀 → (𝑚 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
8	7	eqcoms 2234	. . . . . . . . 9 ⊢ (𝑀 = 𝑚 → (𝑚 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
9	8	biimpd 144	. . . . . . . 8 ⊢ (𝑀 = 𝑚 → (𝑚 ∈ 𝑉 → 𝑀 ∈ 𝑉))
10		eleq1 2294	. . . . . . . . . 10 ⊢ (𝑛 = 𝑁 → (𝑛 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
11	10	eqcoms 2234	. . . . . . . . 9 ⊢ (𝑁 = 𝑛 → (𝑛 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
12	11	biimpd 144	. . . . . . . 8 ⊢ (𝑁 = 𝑛 → (𝑛 ∈ 𝑉 → 𝑁 ∈ 𝑉))
13	9, 12	im2anan9 602	. . . . . . 7 ⊢ ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) → ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
14	13	com12 30	. . . . . 6 ⊢ ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
15		eleq1 2294	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑀 → (𝑛 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
16	15	eqcoms 2234	. . . . . . . . . 10 ⊢ (𝑀 = 𝑛 → (𝑛 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
17	16	biimpd 144	. . . . . . . . 9 ⊢ (𝑀 = 𝑛 → (𝑛 ∈ 𝑉 → 𝑀 ∈ 𝑉))
18		eleq1 2294	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑁 → (𝑚 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
19	18	eqcoms 2234	. . . . . . . . . 10 ⊢ (𝑁 = 𝑚 → (𝑚 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
20	19	biimpd 144	. . . . . . . . 9 ⊢ (𝑁 = 𝑚 → (𝑚 ∈ 𝑉 → 𝑁 ∈ 𝑉))
21	17, 20	im2anan9 602	. . . . . . . 8 ⊢ ((𝑀 = 𝑛 ∧ 𝑁 = 𝑚) → ((𝑛 ∈ 𝑉 ∧ 𝑚 ∈ 𝑉) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
22	21	com12 30	. . . . . . 7 ⊢ ((𝑛 ∈ 𝑉 ∧ 𝑚 ∈ 𝑉) → ((𝑀 = 𝑛 ∧ 𝑁 = 𝑚) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
23	22	ancoms 268	. . . . . 6 ⊢ ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → ((𝑀 = 𝑛 ∧ 𝑁 = 𝑚) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
24	14, 23	jaod 724	. . . . 5 ⊢ ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → (((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚)) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
25	24	adantl 277	. . . 4 ⊢ (((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) ∧ (𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉)) → (((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚)) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
26	6, 25	sylbid 150	. . 3 ⊢ (((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) ∧ (𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉)) → ({𝑀, 𝑁} = {𝑚, 𝑛} → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
27	26	rexlimdvva 2658	. 2 ⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → (∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛} → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
28	4, 27	mpd 13	1 ⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   ∨ wo 715   ∧ w3a 1004   = wceq 1397   ∈ wcel 2202  ∃wrex 2511  {cpr 3670  ‘cfv 5326  Vtxcvtx 15862  Edgcedg 15907  UPGraphcupgr 15941

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-nul 4215  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8122  ax-resscn 8123  ax-1cn 8124  ax-1re 8125  ax-icn 8126  ax-addcl 8127  ax-addrcl 8128  ax-mulcl 8129  ax-addcom 8131  ax-mulcom 8132  ax-addass 8133  ax-mulass 8134  ax-distr 8135  ax-i2m1 8136  ax-1rid 8138  ax-0id 8139  ax-rnegex 8140  ax-cnre 8142

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-reu 2517  df-rab 2519  df-v 2804  df-sbc 3032  df-csb 3128  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-if 3606  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-int 3929  df-br 4089  df-opab 4151  df-mpt 4152  df-tr 4188  df-id 4390  df-iord 4463  df-on 4465  df-suc 4468  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-f1 5331  df-fo 5332  df-f1o 5333  df-fv 5334  df-riota 5970  df-ov 6020  df-oprab 6021  df-mpo 6022  df-1st 6302  df-2nd 6303  df-1o 6581  df-2o 6582  df-en 6909  df-sub 8351  df-inn 9143  df-2 9201  df-3 9202  df-4 9203  df-5 9204  df-6 9205  df-7 9206  df-8 9207  df-9 9208  df-n0 9402  df-dec 9611  df-ndx 13084  df-slot 13085  df-base 13087  df-edgf 15855  df-vtx 15864  df-iedg 15865  df-edg 15908  df-upgren 15943

This theorem is referenced by: (None)