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Theorem upgredgpr 16304
Description: If a proper pair (of vertices) is a subset of an edge in a pseudograph, the pair is the edge. (Contributed by AV, 30-Dec-2020.)
Hypotheses
Ref Expression
upgredg.v 𝑉 = (Vtx‘𝐺)
upgredg.e 𝐸 = (Edg‘𝐺)
Assertion
Ref Expression
upgredgpr (((𝐺 ∈ UPGraph ∧ 𝐶𝐸 ∧ {𝐴, 𝐵} ⊆ 𝐶) ∧ (𝐴𝑈𝐵𝑊𝐴𝐵)) → {𝐴, 𝐵} = 𝐶)

Proof of Theorem upgredgpr
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 upgredg.v . . . . 5 𝑉 = (Vtx‘𝐺)
2 upgredg.e . . . . 5 𝐸 = (Edg‘𝐺)
31, 2upgredg 16299 . . . 4 ((𝐺 ∈ UPGraph ∧ 𝐶𝐸) → ∃𝑎𝑉𝑏𝑉 𝐶 = {𝑎, 𝑏})
433adant3 1048 . . 3 ((𝐺 ∈ UPGraph ∧ 𝐶𝐸 ∧ {𝐴, 𝐵} ⊆ 𝐶) → ∃𝑎𝑉𝑏𝑉 𝐶 = {𝑎, 𝑏})
5 ssprsseq 3872 . . . . . . . . . 10 ((𝐴𝑈𝐵𝑊𝐴𝐵) → ({𝐴, 𝐵} ⊆ {𝑎, 𝑏} ↔ {𝐴, 𝐵} = {𝑎, 𝑏}))
65biimpd 144 . . . . . . . . 9 ((𝐴𝑈𝐵𝑊𝐴𝐵) → ({𝐴, 𝐵} ⊆ {𝑎, 𝑏} → {𝐴, 𝐵} = {𝑎, 𝑏}))
7 sseq2 3272 . . . . . . . . . 10 (𝐶 = {𝑎, 𝑏} → ({𝐴, 𝐵} ⊆ 𝐶 ↔ {𝐴, 𝐵} ⊆ {𝑎, 𝑏}))
8 eqeq2 2248 . . . . . . . . . 10 (𝐶 = {𝑎, 𝑏} → ({𝐴, 𝐵} = 𝐶 ↔ {𝐴, 𝐵} = {𝑎, 𝑏}))
97, 8imbi12d 234 . . . . . . . . 9 (𝐶 = {𝑎, 𝑏} → (({𝐴, 𝐵} ⊆ 𝐶 → {𝐴, 𝐵} = 𝐶) ↔ ({𝐴, 𝐵} ⊆ {𝑎, 𝑏} → {𝐴, 𝐵} = {𝑎, 𝑏})))
106, 9imbitrrid 156 . . . . . . . 8 (𝐶 = {𝑎, 𝑏} → ((𝐴𝑈𝐵𝑊𝐴𝐵) → ({𝐴, 𝐵} ⊆ 𝐶 → {𝐴, 𝐵} = 𝐶)))
1110com23 78 . . . . . . 7 (𝐶 = {𝑎, 𝑏} → ({𝐴, 𝐵} ⊆ 𝐶 → ((𝐴𝑈𝐵𝑊𝐴𝐵) → {𝐴, 𝐵} = 𝐶)))
1211a1i 9 . . . . . 6 ((𝑎𝑉𝑏𝑉) → (𝐶 = {𝑎, 𝑏} → ({𝐴, 𝐵} ⊆ 𝐶 → ((𝐴𝑈𝐵𝑊𝐴𝐵) → {𝐴, 𝐵} = 𝐶))))
1312rexlimivv 2674 . . . . 5 (∃𝑎𝑉𝑏𝑉 𝐶 = {𝑎, 𝑏} → ({𝐴, 𝐵} ⊆ 𝐶 → ((𝐴𝑈𝐵𝑊𝐴𝐵) → {𝐴, 𝐵} = 𝐶)))
1413com12 30 . . . 4 ({𝐴, 𝐵} ⊆ 𝐶 → (∃𝑎𝑉𝑏𝑉 𝐶 = {𝑎, 𝑏} → ((𝐴𝑈𝐵𝑊𝐴𝐵) → {𝐴, 𝐵} = 𝐶)))
15143ad2ant3 1051 . . 3 ((𝐺 ∈ UPGraph ∧ 𝐶𝐸 ∧ {𝐴, 𝐵} ⊆ 𝐶) → (∃𝑎𝑉𝑏𝑉 𝐶 = {𝑎, 𝑏} → ((𝐴𝑈𝐵𝑊𝐴𝐵) → {𝐴, 𝐵} = 𝐶)))
164, 15mpd 13 . 2 ((𝐺 ∈ UPGraph ∧ 𝐶𝐸 ∧ {𝐴, 𝐵} ⊆ 𝐶) → ((𝐴𝑈𝐵𝑊𝐴𝐵) → {𝐴, 𝐵} = 𝐶))
1716imp 124 1 (((𝐺 ∈ UPGraph ∧ 𝐶𝐸 ∧ {𝐴, 𝐵} ⊆ 𝐶) ∧ (𝐴𝑈𝐵𝑊𝐴𝐵)) → {𝐴, 𝐵} = 𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  w3a 1009   = wceq 1402  wcel 2209  wne 2420  wrex 2529  wss 3220  {cpr 3706  cfv 5372  Vtxcvtx 16167  Edgcedg 16212  UPGraphcupgr 16246
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 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 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280
This theorem 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 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-suc 4511  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-1o 6677  df-2o 6678  df-en 7013  df-sub 8489  df-inn 9284  df-2 9342  df-3 9343  df-4 9344  df-5 9345  df-6 9346  df-7 9347  df-8 9348  df-9 9349  df-n0 9543  df-dec 9757  df-ndx 13333  df-slot 13334  df-base 13336  df-edgf 16160  df-vtx 16169  df-iedg 16170  df-edg 16213  df-upgren 16248
This theorem is referenced by:  upgriswlkdc  16515
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