Theorem umgrislfupgrdom 15966

Description: A multigraph is a loop-free pseudograph. (Contributed by AV, 27-Jan-2021.)

Hypotheses

Ref	Expression
umgrislfupgr.v	|- V = (Vtx ` G )
umgrislfupgr.i	|- I = (iEdg ` G )

Assertion

Ref	Expression
umgrislfupgrdom	|- ( G e. UMGraph <-> ( G e. UPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) )

Distinct variable groups:   x, G   x, V

Allowed substitution hint:   I( x)

Proof of Theorem umgrislfupgrdom

Step	Hyp	Ref	Expression
1		umgrupgr 15949	. . 3 |- ( G e. UMGraph -> G e. UPGraph )
2		umgrislfupgr.v	. . . . 5 |- V = (Vtx ` G )
3		umgrislfupgr.i	. . . . 5 |- I = (iEdg ` G )
4	2, 3	umgrfen 15944	. . . 4 |- ( G e. UMGraph -> I : dom I --> { x e. ~P V | x ~~ 2o } )
5		id 19	. . . . 5 |- ( I : dom I --> { x e. ~P V | x ~~ 2o } -> I : dom I --> { x e. ~P V | x ~~ 2o } )
6		ensymb 6947	. . . . . . . . 9 |- ( 2o ~~ x <-> x ~~ 2o )
7		endom 6929	. . . . . . . . 9 |- ( 2o ~~ x -> 2o ~<_ x )
8	6, 7	sylbir 135	. . . . . . . 8 |- ( x ~~ 2o -> 2o ~<_ x )
9	8	a1i 9	. . . . . . 7 |- ( x e. ~P V -> ( x ~~ 2o -> 2o ~<_ x ) )
10	9	ss2rabi 3307	. . . . . 6 |- { x e. ~P V | x ~~ 2o } C_ { x e. ~P V | 2o ~<_ x }
11	10	a1i 9	. . . . 5 |- ( I : dom I --> { x e. ~P V | x ~~ 2o } -> { x e. ~P V | x ~~ 2o } C_ { x e. ~P V | 2o ~<_ x } )
12	5, 11	fssd 5490	. . . 4 |- ( I : dom I --> { x e. ~P V | x ~~ 2o } -> I : dom I --> { x e. ~P V | 2o ~<_ x } )
13	4, 12	syl 14	. . 3 |- ( G e. UMGraph -> I : dom I --> { x e. ~P V | 2o ~<_ x } )
14	1, 13	jca 306	. 2 |- ( G e. UMGraph -> ( G e. UPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) )
15	2, 3	upgrfen 15934	. . . 4 |- ( G e. UPGraph -> I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } )
16		fin 5518	. . . . 5 |- ( I : dom I --> ( { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } i^i { x e. ~P V | 2o ~<_ x } ) <-> ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) )
17		umgrislfupgrenlem 15965	. . . . . 6 |- ( { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } i^i { x e. ~P V | 2o ~<_ x } ) = { x e. ~P V | x ~~ 2o }
18		feq3 5462	. . . . . 6 |- ( ( { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } i^i { x e. ~P V | 2o ~<_ x } ) = { x e. ~P V | x ~~ 2o } -> ( I : dom I --> ( { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } i^i { x e. ~P V | 2o ~<_ x } ) <-> I : dom I --> { x e. ~P V | x ~~ 2o } ) )
19	17, 18	ax-mp 5	. . . . 5 |- ( I : dom I --> ( { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } i^i { x e. ~P V | 2o ~<_ x } ) <-> I : dom I --> { x e. ~P V | x ~~ 2o } )
20	16, 19	sylbb1 137	. . . 4 |- ( ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> I : dom I --> { x e. ~P V | x ~~ 2o } )
21	15, 20	sylan 283	. . 3 |- ( ( G e. UPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> I : dom I --> { x e. ~P V | x ~~ 2o } )
22	2, 3	isumgren 15942	. . . 4 |- ( G e. UPGraph -> ( G e. UMGraph <-> I : dom I --> { x e. ~P V | x ~~ 2o } ) )
23	22	adantr 276	. . 3 |- ( ( G e. UPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> ( G e. UMGraph <-> I : dom I --> { x e. ~P V | x ~~ 2o } ) )
24	21, 23	mpbird 167	. 2 |- ( ( G e. UPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> G e. UMGraph )
25	14, 24	impbii 126	1 |- ( G e. UMGraph <-> ( G e. UPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 713   = wceq 1395   e. wcel 2200   {crab 2512   i^i cin 3197   C_ wss 3198   ~Pcpw 3650   class class class wbr 4084   dom cdm 4721   -->wf 5318   ` cfv 5322   1oc1o 6568   2oc2o 6569   ~~ cen 6900   ~<_ cdom 6901  Vtxcvtx 15850  iEdgciedg 15851  UPGraphcupgr 15928  UMGraphcumgr 15929

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 4203  ax-nul 4211  ax-pow 4260  ax-pr 4295  ax-un 4526  ax-setind 4631  ax-iinf 4682  ax-cnex 8111  ax-resscn 8112  ax-1cn 8113  ax-1re 8114  ax-icn 8115  ax-addcl 8116  ax-addrcl 8117  ax-mulcl 8118  ax-addcom 8120  ax-mulcom 8121  ax-addass 8122  ax-mulass 8123  ax-distr 8124  ax-i2m1 8125  ax-1rid 8127  ax-0id 8128  ax-rnegex 8129  ax-cnre 8131

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  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 2802  df-sbc 3030  df-csb 3126  df-dif 3200  df-un 3202  df-in 3204  df-ss 3211  df-nul 3493  df-if 3604  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3890  df-int 3925  df-br 4085  df-opab 4147  df-mpt 4148  df-tr 4184  df-id 4386  df-iord 4459  df-on 4461  df-suc 4464  df-iom 4685  df-xp 4727  df-rel 4728  df-cnv 4729  df-co 4730  df-dm 4731  df-rn 4732  df-res 4733  df-ima 4734  df-iota 5282  df-fun 5324  df-fn 5325  df-f 5326  df-f1 5327  df-fo 5328  df-f1o 5329  df-fv 5330  df-riota 5964  df-ov 6014  df-oprab 6015  df-mpo 6016  df-1st 6296  df-2nd 6297  df-1o 6575  df-2o 6576  df-er 6695  df-en 6903  df-dom 6904  df-sub 8340  df-inn 9132  df-2 9190  df-3 9191  df-4 9192  df-5 9193  df-6 9194  df-7 9195  df-8 9196  df-9 9197  df-n0 9391  df-dec 9600  df-ndx 13072  df-slot 13073  df-base 13075  df-edgf 15843  df-vtx 15852  df-iedg 15853  df-upgren 15930  df-umgren 15931

This theorem is referenced by:  vtxdumgrfival  16100