Theorem usgrislfuspgrdom 16311

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

Hypotheses

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

Assertion

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

Distinct variable groups:   x, G   x, V

Allowed substitution hint:   I( x)

Proof of Theorem usgrislfuspgrdom

Step	Hyp	Ref	Expression
1		usgruspgr 16304	. . 3 |- ( G e. USGraph -> G e. USPGraph )
2		usgrislfuspgr.v	. . . . 5 |- V = (Vtx ` G )
3		usgrislfuspgr.i	. . . . 5 |- I = (iEdg ` G )
4	2, 3	usgrfen 16281	. . . 4 |- ( G e. USGraph -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } )
5		f1f 5578	. . . . 5 |- ( I : dom I -1-1-> { x e. ~P V | x ~~ 2o } -> I : dom I --> { x e. ~P V | x ~~ 2o } )
6		ensym 7034	. . . . . . . . 9 |- ( x ~~ 2o -> 2o ~~ x )
7		endom 7015	. . . . . . . . 9 |- ( 2o ~~ x -> 2o ~<_ x )
8	6, 7	syl 14	. . . . . . . 8 |- ( x ~~ 2o -> 2o ~<_ x )
9	8	a1i 9	. . . . . . 7 |- ( x e. ~P V -> ( x ~~ 2o -> 2o ~<_ x ) )
10	9	ss2rabi 3324	. . . . . 6 |- { x e. ~P V | x ~~ 2o } C_ { x e. ~P V | 2o ~<_ x }
11	10	a1i 9	. . . . 5 |- ( I : dom I -1-1-> { x e. ~P V | x ~~ 2o } -> { x e. ~P V | x ~~ 2o } C_ { x e. ~P V | 2o ~<_ x } )
12	5, 11	fssd 5527	. . . 4 |- ( I : dom I -1-1-> { x e. ~P V | x ~~ 2o } -> I : dom I --> { x e. ~P V | 2o ~<_ x } )
13	4, 12	syl 14	. . 3 |- ( G e. USGraph -> I : dom I --> { x e. ~P V | 2o ~<_ x } )
14	1, 13	jca 306	. 2 |- ( G e. USGraph -> ( G e. USPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) )
15	2, 3	uspgrfen 16280	. . . 4 |- ( G e. USPGraph -> I : dom I -1-1-> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } )
16		df-f1 5362	. . . . . 6 |- ( I : dom I -1-1-> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } <-> ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ Fun `' I ) )
17		fin 5558	. . . . . . . . . . 11 |- ( 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 } ) )
18		umgrislfupgrenlem 16251	. . . . . . . . . . . 12 |- ( { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } i^i { x e. ~P V | 2o ~<_ x } ) = { x e. ~P V | x ~~ 2o }
19		feq3 5498	. . . . . . . . . . . 12 |- ( ( { 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 } ) )
20	18, 19	ax-mp 5	. . . . . . . . . . 11 |- ( 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 } )
21	17, 20	sylbb1 137	. . . . . . . . . 10 |- ( ( 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 } )
22	21	anim1i 340	. . . . . . . . 9 |- ( ( ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) /\ Fun `' I ) -> ( I : dom I --> { x e. ~P V | x ~~ 2o } /\ Fun `' I ) )
23		df-f1 5362	. . . . . . . . 9 |- ( I : dom I -1-1-> { x e. ~P V | x ~~ 2o } <-> ( I : dom I --> { x e. ~P V | x ~~ 2o } /\ Fun `' I ) )
24	22, 23	sylibr 134	. . . . . . . 8 |- ( ( ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) /\ Fun `' I ) -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } )
25	24	ex 115	. . . . . . 7 |- ( ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> ( Fun `' I -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } ) )
26	25	impancom 260	. . . . . 6 |- ( ( I : dom I --> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ Fun `' I ) -> ( I : dom I --> { x e. ~P V | 2o ~<_ x } -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } ) )
27	16, 26	sylbi 121	. . . . 5 |- ( I : dom I -1-1-> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } -> ( I : dom I --> { x e. ~P V | 2o ~<_ x } -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } ) )
28	27	imp 124	. . . 4 |- ( ( I : dom I -1-1-> { x e. ~P V | ( x ~~ 1o \/ x ~~ 2o ) } /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } )
29	15, 28	sylan 283	. . 3 |- ( ( G e. USPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } )
30	2, 3	isusgren 16279	. . . 4 |- ( G e. USPGraph -> ( G e. USGraph <-> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } ) )
31	30	adantr 276	. . 3 |- ( ( G e. USPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> ( G e. USGraph <-> I : dom I -1-1-> { x e. ~P V | x ~~ 2o } ) )
32	29, 31	mpbird 167	. 2 |- ( ( G e. USPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) -> G e. USGraph )
33	14, 32	impbii 126	1 |- ( G e. USGraph <-> ( G e. USPGraph /\ I : dom I --> { x e. ~P V | 2o ~<_ x } ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 716   = wceq 1398   e. wcel 2205   {crab 2526   i^i cin 3213   C_ wss 3214   ~Pcpw 3674   class class class wbr 4114   `'ccnv 4753   dom cdm 4754   Fun wfun 5351   -->wf 5353   -1-1->wf1 5354   ` cfv 5357   1oc1o 6653   2oc2o 6654   ~~ cen 6986   ~<_ cdom 6987  Vtxcvtx 16133  iEdgciedg 16134  USPGraphcuspgr 16274  USGraphcusgr 16275

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-sep 4233  ax-nul 4241  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-iinf 4715  ax-cnex 8234  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-icn 8238  ax-addcl 8239  ax-addrcl 8240  ax-mulcl 8241  ax-addcom 8243  ax-mulcom 8244  ax-addass 8245  ax-mulass 8246  ax-distr 8247  ax-i2m1 8248  ax-1rid 8250  ax-0id 8251  ax-rnegex 8252  ax-cnre 8254

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-ral 2527  df-rex 2528  df-reu 2529  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-if 3625  df-pw 3676  df-sn 3700  df-pr 3701  df-op 3703  df-uni 3920  df-int 3955  df-br 4115  df-opab 4177  df-mpt 4178  df-tr 4214  df-id 4419  df-iord 4492  df-on 4494  df-suc 4497  df-iom 4718  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-ima 4767  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-f1 5362  df-fo 5363  df-f1o 5364  df-fv 5365  df-riota 6011  df-ov 6061  df-oprab 6062  df-mpo 6063  df-1st 6347  df-2nd 6348  df-1o 6660  df-2o 6661  df-er 6780  df-en 6989  df-dom 6990  df-sub 8462  df-inn 9255  df-2 9313  df-3 9314  df-4 9315  df-5 9316  df-6 9317  df-7 9318  df-8 9319  df-9 9320  df-n0 9514  df-dec 9728  df-ndx 13299  df-slot 13300  df-base 13302  df-edgf 16126  df-vtx 16135  df-iedg 16136  df-uspgren 16276  df-usgren 16277

This theorem is referenced by: (None)