Theorem upgredgpr 15941

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 e. UPGraph /\ C e. E /\ { A , B } C_ C ) /\ ( A e. U /\ B e. W /\ A =/= B ) ) -> { A , B } = C )

Proof of Theorem upgredgpr

Dummy variables a b are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		upgredg.v	. . . . 5 |- V = (Vtx ` G )
2		upgredg.e	. . . . 5 |- E = (Edg ` G )
3	1, 2	upgredg 15936	. . . 4 |- ( ( G e. UPGraph /\ C e. E ) -> E. a e. V E. b e. V C = { a , b } )
4	3	3adant3 1041	. . 3 |- ( ( G e. UPGraph /\ C e. E /\ { A , B } C_ C ) -> E. a e. V E. b e. V C = { a , b } )
5		ssprsseq 3829	. . . . . . . . . 10 |- ( ( A e. U /\ B e. W /\ A =/= B ) -> ( { A , B } C_ { a , b } <-> { A , B } = { a , b } ) )
6	5	biimpd 144	. . . . . . . . 9 |- ( ( A e. U /\ B e. W /\ A =/= B ) -> ( { A , B } C_ { a , b } -> { A , B } = { a , b } ) )
7		sseq2 3248	. . . . . . . . . 10 |- ( C = { a , b } -> ( { A , B } C_ C <-> { A , B } C_ { a , b } ) )
8		eqeq2 2239	. . . . . . . . . 10 |- ( C = { a , b } -> ( { A , B } = C <-> { A , B } = { a , b } ) )
9	7, 8	imbi12d 234	. . . . . . . . 9 |- ( C = { a , b } -> ( ( { A , B } C_ C -> { A , B } = C ) <-> ( { A , B } C_ { a , b } -> { A , B } = { a , b } ) ) )
10	6, 9	imbitrrid 156	. . . . . . . 8 |- ( C = { a , b } -> ( ( A e. U /\ B e. W /\ A =/= B ) -> ( { A , B } C_ C -> { A , B } = C ) ) )
11	10	com23 78	. . . . . . 7 |- ( C = { a , b } -> ( { A , B } C_ C -> ( ( A e. U /\ B e. W /\ A =/= B ) -> { A , B } = C ) ) )
12	11	a1i 9	. . . . . 6 |- ( ( a e. V /\ b e. V ) -> ( C = { a , b } -> ( { A , B } C_ C -> ( ( A e. U /\ B e. W /\ A =/= B ) -> { A , B } = C ) ) ) )
13	12	rexlimivv 2654	. . . . 5 |- ( E. a e. V E. b e. V C = { a , b } -> ( { A , B } C_ C -> ( ( A e. U /\ B e. W /\ A =/= B ) -> { A , B } = C ) ) )
14	13	com12 30	. . . 4 |- ( { A , B } C_ C -> ( E. a e. V E. b e. V C = { a , b } -> ( ( A e. U /\ B e. W /\ A =/= B ) -> { A , B } = C ) ) )
15	14	3ad2ant3 1044	. . 3 |- ( ( G e. UPGraph /\ C e. E /\ { A , B } C_ C ) -> ( E. a e. V E. b e. V C = { a , b } -> ( ( A e. U /\ B e. W /\ A =/= B ) -> { A , B } = C ) ) )
16	4, 15	mpd 13	. 2 |- ( ( G e. UPGraph /\ C e. E /\ { A , B } C_ C ) -> ( ( A e. U /\ B e. W /\ A =/= B ) -> { A , B } = C ) )
17	16	imp 124	1 |- ( ( ( G e. UPGraph /\ C e. E /\ { A , B } C_ C ) /\ ( A e. U /\ B e. W /\ A =/= B ) ) -> { A , B } = C )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1002   = wceq 1395   e. wcel 2200   =/= wne 2400   E.wrex 2509   C_ wss 3197   {cpr 3667   ` cfv 5317  Vtxcvtx 15807  Edgcedg 15852  UPGraphcupgr 15885

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 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-nul 4209  ax-pow 4257  ax-pr 4292  ax-un 4523  ax-setind 4628  ax-cnex 8086  ax-resscn 8087  ax-1cn 8088  ax-1re 8089  ax-icn 8090  ax-addcl 8091  ax-addrcl 8092  ax-mulcl 8093  ax-addcom 8095  ax-mulcom 8096  ax-addass 8097  ax-mulass 8098  ax-distr 8099  ax-i2m1 8100  ax-1rid 8102  ax-0id 8103  ax-rnegex 8104  ax-cnre 8106

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-ral 2513  df-rex 2514  df-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-if 3603  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-br 4083  df-opab 4145  df-mpt 4146  df-tr 4182  df-id 4383  df-iord 4456  df-on 4458  df-suc 4461  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-ima 4731  df-iota 5277  df-fun 5319  df-fn 5320  df-f 5321  df-f1 5322  df-fo 5323  df-f1o 5324  df-fv 5325  df-riota 5953  df-ov 6003  df-oprab 6004  df-mpo 6005  df-1st 6284  df-2nd 6285  df-1o 6560  df-2o 6561  df-en 6886  df-sub 8315  df-inn 9107  df-2 9165  df-3 9166  df-4 9167  df-5 9168  df-6 9169  df-7 9170  df-8 9171  df-9 9172  df-n0 9366  df-dec 9575  df-ndx 13030  df-slot 13031  df-base 13033  df-edgf 15800  df-vtx 15809  df-iedg 15810  df-edg 15853  df-upgren 15887

This theorem is referenced by: (None)