Theorem upgrpredgv 16553

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 16551	. . 3 ⊢ ((𝐺 ∈ UPGraph ∧ {𝑀, 𝑁} ∈ 𝐸) → ∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛})
4	3	3adant2 1047	. 2 ⊢ ((𝐺 ∈ UPGraph ∧ (𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ {𝑀, 𝑁} ∈ 𝐸) → ∃𝑚 ∈ 𝑉 ∃𝑛 ∈ 𝑉 {𝑀, 𝑁} = {𝑚, 𝑛})
5		preq12bg 3898	. . . . 5 ⊢ (((𝑀 ∈ 𝑈 ∧ 𝑁 ∈ 𝑊) ∧ (𝑚 ∈ 𝑉 ∧ 𝑛 ∈ 𝑉)) → ({𝑀, 𝑁} = {𝑚, 𝑛} ↔ ((𝑀 = 𝑚 ∧ 𝑁 = 𝑛) ∨ (𝑀 = 𝑛 ∧ 𝑁 = 𝑚))))
6	5	3ad2antl2 1191	. . . 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 2301	. . . . . . . . . 10 ⊢ (𝑚 = 𝑀 → (𝑚 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
8	7	eqcoms 2241	. . . . . . . . 9 ⊢ (𝑀 = 𝑚 → (𝑚 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
9	8	biimpd 144	. . . . . . . 8 ⊢ (𝑀 = 𝑚 → (𝑚 ∈ 𝑉 → 𝑀 ∈ 𝑉))
10		eleq1 2301	. . . . . . . . . 10 ⊢ (𝑛 = 𝑁 → (𝑛 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
11	10	eqcoms 2241	. . . . . . . . 9 ⊢ (𝑁 = 𝑛 → (𝑛 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
12	11	biimpd 144	. . . . . . . 8 ⊢ (𝑁 = 𝑛 → (𝑛 ∈ 𝑉 → 𝑁 ∈ 𝑉))
13	9, 12	im2anan9 606	. . . . . . 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 2301	. . . . . . . . . . 11 ⊢ (𝑛 = 𝑀 → (𝑛 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
16	15	eqcoms 2241	. . . . . . . . . 10 ⊢ (𝑀 = 𝑛 → (𝑛 ∈ 𝑉 ↔ 𝑀 ∈ 𝑉))
17	16	biimpd 144	. . . . . . . . 9 ⊢ (𝑀 = 𝑛 → (𝑛 ∈ 𝑉 → 𝑀 ∈ 𝑉))
18		eleq1 2301	. . . . . . . . . . 11 ⊢ (𝑚 = 𝑁 → (𝑚 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
19	18	eqcoms 2241	. . . . . . . . . 10 ⊢ (𝑁 = 𝑚 → (𝑚 ∈ 𝑉 ↔ 𝑁 ∈ 𝑉))
20	19	biimpd 144	. . . . . . . . 9 ⊢ (𝑁 = 𝑚 → (𝑚 ∈ 𝑉 → 𝑁 ∈ 𝑉))
21	17, 20	im2anan9 606	. . . . . . . 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 729	. . . . 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 2676	. 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))

This proof depends on syntax axioms:   → wi 4   ∧ wa 104   ↔ wb 105   ∨ wo 720   ∧ w3a 1009   = wceq 1402   ∈ wcel 2209  ∃wrex 2529  {cpr 3710  ‘cfv 5377  Vtxcvtx 16419  Edgcedg 16464  UPGraphcupgr 16498

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-nul 4259  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684  ax-cnex 8271  ax-resscn 8272  ax-1cn 8273  ax-1re 8274  ax-icn 8275  ax-addcl 8276  ax-addrcl 8277  ax-mulcl 8278  ax-addcom 8280  ax-mulcom 8281  ax-addass 8282  ax-mulass 8283  ax-distr 8284  ax-i2m1 8285  ax-1rid 8287  ax-0id 8288  ax-rnegex 8289  ax-cnre 8291

This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-if 3639  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-br 4131  df-opab 4193  df-mpt 4194  df-tr 4230  df-id 4438  df-iord 4511  df-on 4513  df-suc 4516  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-res 4786  df-ima 4787  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-f1 5382  df-fo 5383  df-f1o 5384  df-fv 5385  df-riota 6038  df-ov 6088  df-oprab 6089  df-mpo 6090  df-1st 6374  df-2nd 6375  df-1o 6687  df-2o 6688  df-en 7023  df-sub 8501  df-inn 9308  df-2 9366  df-3 9367  df-4 9368  df-5 9369  df-6 9370  df-7 9371  df-8 9372  df-9 9373  df-n0 9569  df-dec 9783  df-ndx 13407  df-slot 13408  df-base 13410  df-edgf 16412  df-vtx 16421  df-iedg 16422  df-edg 16465  df-upgren 16500

This theorem is used by: (None)