Theorem subusgr 16152

Description: A subgraph of a simple graph is a simple graph. (Contributed by AV, 16-Nov-2020.) (Proof shortened by AV, 27-Nov-2020.)

Assertion

Ref	Expression
subusgr	|- ( ( G e. USGraph /\ S SubGraph G ) -> S e. USGraph )

Proof of Theorem subusgr

Dummy variables x e y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2230	. . . 4 |- (Vtx ` S ) = (Vtx ` S )
2		eqid 2230	. . . 4 |- (Vtx ` G ) = (Vtx ` G )
3		eqid 2230	. . . 4 |- (iEdg ` S ) = (iEdg ` S )
4		eqid 2230	. . . 4 |- (iEdg ` G ) = (iEdg ` G )
5		eqid 2230	. . . 4 |- (Edg ` S ) = (Edg ` S )
6	1, 2, 3, 4, 5	subgrprop2 16137	. . 3 |- ( S SubGraph G -> ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) )
7		usgruhgr 16066	. . . . . . . . . . 11 |- ( G e. USGraph -> G e. UHGraph )
8		subgruhgrfun 16145	. . . . . . . . . . 11 |- ( ( G e. UHGraph /\ S SubGraph G ) -> Fun (iEdg ` S ) )
9	7, 8	sylan 283	. . . . . . . . . 10 |- ( ( G e. USGraph /\ S SubGraph G ) -> Fun (iEdg ` S ) )
10	9	ancoms 268	. . . . . . . . 9 |- ( ( S SubGraph G /\ G e. USGraph ) -> Fun (iEdg ` S ) )
11	10	funfnd 5356	. . . . . . . 8 |- ( ( S SubGraph G /\ G e. USGraph ) -> (iEdg ` S ) Fn dom (iEdg ` S ) )
12	11	adantl 277	. . . . . . 7 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> (iEdg ` S ) Fn dom (iEdg ` S ) )
13		simplrl 537	. . . . . . . . . 10 |- ( ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) /\ x e. dom (iEdg ` S ) ) -> S SubGraph G )
14		usgrumgr 16061	. . . . . . . . . . . . 13 |- ( G e. USGraph -> G e. UMGraph )
15	14	adantl 277	. . . . . . . . . . . 12 |- ( ( S SubGraph G /\ G e. USGraph ) -> G e. UMGraph )
16	15	adantl 277	. . . . . . . . . . 11 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> G e. UMGraph )
17	16	adantr 276	. . . . . . . . . 10 |- ( ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) /\ x e. dom (iEdg ` S ) ) -> G e. UMGraph )
18		simpr 110	. . . . . . . . . 10 |- ( ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) /\ x e. dom (iEdg ` S ) ) -> x e. dom (iEdg ` S ) )
19	1, 3	subumgredg2en 16148	. . . . . . . . . 10 |- ( ( S SubGraph G /\ G e. UMGraph /\ x e. dom (iEdg ` S ) ) -> ( (iEdg ` S ) ` x ) e. { e e. ~P (Vtx ` S ) | e ~~ 2o } )
20	13, 17, 18, 19	syl3anc 1273	. . . . . . . . 9 |- ( ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) /\ x e. dom (iEdg ` S ) ) -> ( (iEdg ` S ) ` x ) e. { e e. ~P (Vtx ` S ) | e ~~ 2o } )
21	20	ralrimiva 2604	. . . . . . . 8 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> A. x e. dom (iEdg ` S ) ( (iEdg ` S ) ` x ) e. { e e. ~P (Vtx ` S ) | e ~~ 2o } )
22		fnfvrnss 5807	. . . . . . . 8 |- ( ( (iEdg ` S ) Fn dom (iEdg ` S ) /\ A. x e. dom (iEdg ` S ) ( (iEdg ` S ) ` x ) e. { e e. ~P (Vtx ` S ) | e ~~ 2o } ) -> ran (iEdg ` S ) C_ { e e. ~P (Vtx ` S ) | e ~~ 2o } )
23	12, 21, 22	syl2anc 411	. . . . . . 7 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> ran (iEdg ` S ) C_ { e e. ~P (Vtx ` S ) | e ~~ 2o } )
24		df-f 5329	. . . . . . 7 |- ( (iEdg ` S ) : dom (iEdg ` S ) --> { e e. ~P (Vtx ` S ) | e ~~ 2o } <-> ( (iEdg ` S ) Fn dom (iEdg ` S ) /\ ran (iEdg ` S ) C_ { e e. ~P (Vtx ` S ) | e ~~ 2o } ) )
25	12, 23, 24	sylanbrc 417	. . . . . 6 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> (iEdg ` S ) : dom (iEdg ` S ) --> { e e. ~P (Vtx ` S ) | e ~~ 2o } )
26		simp2 1024	. . . . . . . . 9 |- ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) -> (iEdg ` S ) C_ (iEdg ` G ) )
27	2, 4	usgrfen 16037	. . . . . . . . . . 11 |- ( G e. USGraph -> (iEdg ` G ) : dom (iEdg ` G ) -1-1-> { y e. ~P (Vtx ` G ) | y ~~ 2o } )
28		df-f1 5330	. . . . . . . . . . . 12 |- ( (iEdg ` G ) : dom (iEdg ` G ) -1-1-> { y e. ~P (Vtx ` G ) | y ~~ 2o } <-> ( (iEdg ` G ) : dom (iEdg ` G ) --> { y e. ~P (Vtx ` G ) | y ~~ 2o } /\ Fun `' (iEdg ` G ) ) )
29		ffun 5484	. . . . . . . . . . . . 13 |- ( (iEdg ` G ) : dom (iEdg ` G ) --> { y e. ~P (Vtx ` G ) | y ~~ 2o } -> Fun (iEdg ` G ) )
30	29	anim1i 340	. . . . . . . . . . . 12 |- ( ( (iEdg ` G ) : dom (iEdg ` G ) --> { y e. ~P (Vtx ` G ) | y ~~ 2o } /\ Fun `' (iEdg ` G ) ) -> ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) ) )
31	28, 30	sylbi 121	. . . . . . . . . . 11 |- ( (iEdg ` G ) : dom (iEdg ` G ) -1-1-> { y e. ~P (Vtx ` G ) | y ~~ 2o } -> ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) ) )
32	27, 31	syl 14	. . . . . . . . . 10 |- ( G e. USGraph -> ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) ) )
33	32	adantl 277	. . . . . . . . 9 |- ( ( S SubGraph G /\ G e. USGraph ) -> ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) ) )
34	26, 33	anim12ci 339	. . . . . . . 8 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> ( ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) ) /\ (iEdg ` S ) C_ (iEdg ` G ) ) )
35		df-3an 1006	. . . . . . . 8 |- ( ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) ) <-> ( ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) ) /\ (iEdg ` S ) C_ (iEdg ` G ) ) )
36	34, 35	sylibr 134	. . . . . . 7 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) ) )
37		f1ssf1 5615	. . . . . . 7 |- ( ( Fun (iEdg ` G ) /\ Fun `' (iEdg ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) ) -> Fun `' (iEdg ` S ) )
38	36, 37	syl 14	. . . . . 6 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> Fun `' (iEdg ` S ) )
39		df-f1 5330	. . . . . 6 |- ( (iEdg ` S ) : dom (iEdg ` S ) -1-1-> { e e. ~P (Vtx ` S ) | e ~~ 2o } <-> ( (iEdg ` S ) : dom (iEdg ` S ) --> { e e. ~P (Vtx ` S ) | e ~~ 2o } /\ Fun `' (iEdg ` S ) ) )
40	25, 38, 39	sylanbrc 417	. . . . 5 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> (iEdg ` S ) : dom (iEdg ` S ) -1-1-> { e e. ~P (Vtx ` S ) | e ~~ 2o } )
41		subgrv 16133	. . . . . . . . 9 |- ( S SubGraph G -> ( S e. _V /\ G e. _V ) )
42	41	simpld 112	. . . . . . . 8 |- ( S SubGraph G -> S e. _V )
43	1, 3	isusgren 16035	. . . . . . . 8 |- ( S e. _V -> ( S e. USGraph <-> (iEdg ` S ) : dom (iEdg ` S ) -1-1-> { e e. ~P (Vtx ` S ) | e ~~ 2o } ) )
44	42, 43	syl 14	. . . . . . 7 |- ( S SubGraph G -> ( S e. USGraph <-> (iEdg ` S ) : dom (iEdg ` S ) -1-1-> { e e. ~P (Vtx ` S ) | e ~~ 2o } ) )
45	44	adantr 276	. . . . . 6 |- ( ( S SubGraph G /\ G e. USGraph ) -> ( S e. USGraph <-> (iEdg ` S ) : dom (iEdg ` S ) -1-1-> { e e. ~P (Vtx ` S ) | e ~~ 2o } ) )
46	45	adantl 277	. . . . 5 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> ( S e. USGraph <-> (iEdg ` S ) : dom (iEdg ` S ) -1-1-> { e e. ~P (Vtx ` S ) | e ~~ 2o } ) )
47	40, 46	mpbird 167	. . . 4 |- ( ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) /\ ( S SubGraph G /\ G e. USGraph ) ) -> S e. USGraph )
48	47	ex 115	. . 3 |- ( ( (Vtx ` S ) C_ (Vtx ` G ) /\ (iEdg ` S ) C_ (iEdg ` G ) /\ (Edg ` S ) C_ ~P (Vtx ` S ) ) -> ( ( S SubGraph G /\ G e. USGraph ) -> S e. USGraph ) )
49	6, 48	syl 14	. 2 |- ( S SubGraph G -> ( ( S SubGraph G /\ G e. USGraph ) -> S e. USGraph ) )
50	49	anabsi8 584	1 |- ( ( G e. USGraph /\ S SubGraph G ) -> S e. USGraph )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 1004   e. wcel 2201   A.wral 2509   {crab 2513   _Vcvv 2801   C_ wss 3199   ~Pcpw 3651   class class class wbr 4087   `'ccnv 4723   dom cdm 4724   ran crn 4725   Fun wfun 5319   Fn wfn 5320   -->wf 5321   -1-1->wf1 5322   ` cfv 5325   2oc2o 6578   ~~ cen 6909  Vtxcvtx 15889  iEdgciedg 15890  Edgcedg 15934  UHGraphcuhgr 15944  UMGraphcumgr 15969  USGraphcusgr 16031   SubGraph csubgr 16130

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2203  ax-14 2204  ax-ext 2212  ax-sep 4206  ax-nul 4214  ax-pow 4263  ax-pr 4298  ax-un 4529  ax-setind 4634  ax-cnex 8125  ax-resscn 8126  ax-1cn 8127  ax-1re 8128  ax-icn 8129  ax-addcl 8130  ax-addrcl 8131  ax-mulcl 8132  ax-addcom 8134  ax-mulcom 8135  ax-addass 8136  ax-mulass 8137  ax-distr 8138  ax-i2m1 8139  ax-1rid 8141  ax-0id 8142  ax-rnegex 8143  ax-cnre 8145

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1810  df-eu 2081  df-mo 2082  df-clab 2217  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ne 2402  df-ral 2514  df-rex 2515  df-reu 2516  df-rab 2518  df-v 2803  df-sbc 3031  df-csb 3127  df-dif 3201  df-un 3203  df-in 3205  df-ss 3212  df-nul 3494  df-if 3605  df-pw 3653  df-sn 3674  df-pr 3675  df-op 3677  df-uni 3893  df-int 3928  df-br 4088  df-opab 4150  df-mpt 4151  df-tr 4187  df-id 4389  df-iord 4462  df-on 4464  df-suc 4467  df-xp 4730  df-rel 4731  df-cnv 4732  df-co 4733  df-dm 4734  df-rn 4735  df-res 4736  df-ima 4737  df-iota 5285  df-fun 5327  df-fn 5328  df-f 5329  df-f1 5330  df-fo 5331  df-f1o 5332  df-fv 5333  df-riota 5973  df-ov 6023  df-oprab 6024  df-mpo 6025  df-1st 6305  df-2nd 6306  df-1o 6584  df-2o 6585  df-en 6912  df-sub 8354  df-inn 9146  df-2 9204  df-3 9205  df-4 9206  df-5 9207  df-6 9208  df-7 9209  df-8 9210  df-9 9211  df-n0 9405  df-dec 9614  df-ndx 13105  df-slot 13106  df-base 13108  df-edgf 15882  df-vtx 15891  df-iedg 15892  df-edg 15935  df-uhgrm 15946  df-upgren 15970  df-umgren 15971  df-uspgren 16032  df-usgren 16033  df-subgr 16131

This theorem is referenced by:  usgrspan  16158