Theorem upgrpredgv 26034

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 26032	. . 3 ⊢ ((𝐺 ∈ UPGraph ∧ {𝑀, 𝑁} ∈ 𝐸) → ∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛})
4	3	3adant2 1080	. 2 ⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → ∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛})
5		preq12bg 4386	. . . . 5 ⊢ (((𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ (𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉)) → ({𝑀, 𝑁} = {𝑚, 𝑛} ↔ ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚))))
6	5	3ad2antl2 1224	. . . 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 2689	. . . . . . . . . 10 ⊢ (𝑚 = 𝑀 → (𝑚 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
8	7	eqcoms 2630	. . . . . . . . 9 ⊢ (𝑀 = 𝑚 → (𝑚 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
9	8	biimpd 219	. . . . . . . 8 ⊢ (𝑀 = 𝑚 → (𝑚 ∈ 𝑉 → 𝑀 ∈ 𝑉))
10		eleq1 2689	. . . . . . . . . 10 ⊢ (𝑛 = 𝑁 → (𝑛 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
11	10	eqcoms 2630	. . . . . . . . 9 ⊢ (𝑁 = 𝑛 → (𝑛 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
12	11	biimpd 219	. . . . . . . 8 ⊢ (𝑁 = 𝑛 → (𝑛 ∈ 𝑉 → 𝑁 ∈ 𝑉))
13	9, 12	im2anan9 880	. . . . . . 7 ⊢ ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) → ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
14	13	com12 32	. . . . . 6 ⊢ ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
15		eleq1 2689	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑀 → (𝑛 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
16	15	eqcoms 2630	. . . . . . . . . 10 ⊢ (𝑀 = 𝑛 → (𝑛 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
17	16	biimpd 219	. . . . . . . . 9 ⊢ (𝑀 = 𝑛 → (𝑛 ∈ 𝑉 → 𝑀 ∈ 𝑉))
18		eleq1 2689	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑁 → (𝑚 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
19	18	eqcoms 2630	. . . . . . . . . 10 ⊢ (𝑁 = 𝑚 → (𝑚 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
20	19	biimpd 219	. . . . . . . . 9 ⊢ (𝑁 = 𝑚 → (𝑚 ∈ 𝑉 → 𝑁 ∈ 𝑉))
21	17, 20	im2anan9 880	. . . . . . . 8 ⊢ ((𝑀 = 𝑛 ∧ 𝑁 = 𝑚) → ((𝑛 ∈ 𝑉 ∧ 𝑚 ∈ 𝑉) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
22	21	com12 32	. . . . . . 7 ⊢ ((𝑛 ∈ 𝑉 ∧ 𝑚 ∈ 𝑉) → ((𝑀 = 𝑛 ∧ 𝑁 = 𝑚) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
23	22	ancoms 469	. . . . . 6 ⊢ ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → ((𝑀 = 𝑛 ∧ 𝑁 = 𝑚) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
24	14, 23	jaod 395	. . . . 5 ⊢ ((𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉) → (((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚)) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉)))
25	24	adantl 482	. . . 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 230	. . 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 3038	. 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 15	1 ⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → (𝑀 ∈ 𝑉 ∧ 𝑁 ∈ 𝑉))

Syntax hints:   → wi 4   ↔ wb 196   ∨ wo 383   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990  ∃wrex 2913  {cpr 4179  ‘cfv 5888  Vtxcvtx 25874  Edgcedg 25939   UPGraph cupgr 25975

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-rep 4771  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-rmo 2920  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-2o 7561  df-oadd 7564  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-card 8765  df-cda 8990  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-n0 11293  df-xnn0 11364  df-z 11378  df-uz 11688  df-fz 12327  df-hash 13118  df-edg 25940  df-upgr 25977

This theorem is referenced by: (None)