Theorem clwwlkg 16380

Description: The set of closed walks (in an undirected graph) as words over the set of vertices. (Contributed by Alexander van der Vekens, 20-Mar-2018.) (Revised by AV, 24-Apr-2021.)

Hypotheses

Ref	Expression
clwwlk.v	|- V = (Vtx ` G )
clwwlk.e	|- E = (Edg ` G )

Assertion

Ref	Expression
clwwlkg	|- ( G e. W -> (ClWWalks ` G ) = { w e. Word V | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E /\ { (lastS ` w ) , ( w ` 0 ) } e. E ) } )

Distinct variable groups:   i, G, w   w, V

Allowed substitution hints:   E( w, i)   V( i)   W( w, i)

Proof of Theorem clwwlkg

Dummy variable g is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-clwwlk 16379	. 2 |- ClWWalks = ( g e. _V |-> { w e. Word (Vtx ` g ) | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. (Edg ` g ) /\ { (lastS ` w ) , ( w ` 0 ) } e. (Edg ` g ) ) } )
2		fveq2 5669	. . . . 5 |- ( g = G -> (Vtx ` g ) = (Vtx ` G ) )
3		clwwlk.v	. . . . 5 |- V = (Vtx ` G )
4	2, 3	eqtr4di 2283	. . . 4 |- ( g = G -> (Vtx ` g ) = V )
5		wrdeq 11242	. . . 4 |- ( (Vtx ` g ) = V -> Word (Vtx ` g ) = Word V )
6	4, 5	syl 14	. . 3 |- ( g = G -> Word (Vtx ` g ) = Word V )
7		fveq2 5669	. . . . . . 7 |- ( g = G -> (Edg ` g ) = (Edg ` G ) )
8		clwwlk.e	. . . . . . 7 |- E = (Edg ` G )
9	7, 8	eqtr4di 2283	. . . . . 6 |- ( g = G -> (Edg ` g ) = E )
10	9	eleq2d 2302	. . . . 5 |- ( g = G -> ( { ( w ` i ) , ( w ` ( i + 1 ) ) } e. (Edg ` g ) <-> { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E ) )
11	10	ralbidv 2542	. . . 4 |- ( g = G -> ( A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. (Edg ` g ) <-> A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E ) )
12	9	eleq2d 2302	. . . 4 |- ( g = G -> ( { (lastS ` w ) , ( w ` 0 ) } e. (Edg ` g ) <-> { (lastS ` w ) , ( w ` 0 ) } e. E ) )
13	11, 12	3anbi23d 1352	. . 3 |- ( g = G -> ( ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. (Edg ` g ) /\ { (lastS ` w ) , ( w ` 0 ) } e. (Edg ` g ) ) <-> ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E /\ { (lastS ` w ) , ( w ` 0 ) } e. E ) ) )
14	6, 13	rabeqbidv 2807	. 2 |- ( g = G -> { w e. Word (Vtx ` g ) | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. (Edg ` g ) /\ { (lastS ` w ) , ( w ` 0 ) } e. (Edg ` g ) ) } = { w e. Word V | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E /\ { (lastS ` w ) , ( w ` 0 ) } e. E ) } )
15		elex 2824	. 2 |- ( G e. W -> G e. _V )
16		vtxex 16005	. . . 4 |- ( G e. W -> (Vtx ` G ) e. _V )
17	3, 16	eqeltrid 2319	. . 3 |- ( G e. W -> V e. _V )
18		wrdexg 11231	. . 3 |- ( V e. _V -> Word V e. _V )
19		rabexg 4254	. . 3 |- (Word V e. _V -> { w e. Word V | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E /\ { (lastS ` w ) , ( w ` 0 ) } e. E ) } e. _V )
20	17, 18, 19	3syl 17	. 2 |- ( G e. W -> { w e. Word V | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E /\ { (lastS ` w ) , ( w ` 0 ) } e. E ) } e. _V )
21	1, 14, 15, 20	fvmptd3 5770	1 |- ( G e. W -> (ClWWalks ` G ) = { w e. Word V | ( w =/= (/) /\ A. i e. ( 0..^ ( (♯ ` w ) - 1 ) ) { ( w ` i ) , ( w ` ( i + 1 ) ) } e. E /\ { (lastS ` w ) , ( w ` 0 ) } e. E ) } )

Syntax hints:   -> wi 4   /\ w3a 1005   = wceq 1398   e. wcel 2203   =/= wne 2412   A.wral 2520   {crab 2524   _Vcvv 2812   (/)c0 3507   {cpr 3689   ` cfv 5351  (class class class)co 6049   0cc0 8126   1c1 8127   + caddc 8129   - cmin 8443  ..^cfzo 10475  ♯chash 11136  Word cword 11220  lastSclsw 11265  Vtxcvtx 15999  Edgcedg 16044  ClWWalkscclwwlk 16378

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 2205  ax-14 2206  ax-ext 2214  ax-coll 4224  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-iinf 4709  ax-cnex 8217  ax-resscn 8218  ax-1cn 8219  ax-1re 8220  ax-icn 8221  ax-addcl 8222  ax-addrcl 8223  ax-mulcl 8224  ax-addcom 8226  ax-addass 8228  ax-distr 8230  ax-i2m1 8231  ax-0lt1 8232  ax-0id 8234  ax-rnegex 8235  ax-cnre 8237  ax-pre-ltirr 8238  ax-pre-ltwlin 8239  ax-pre-lttrn 8240  ax-pre-apti 8241  ax-pre-ltadd 8242

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 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-if 3620  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-tr 4208  df-id 4413  df-iord 4486  df-on 4488  df-ilim 4489  df-suc 4491  df-iom 4712  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-1st 6333  df-2nd 6334  df-recs 6535  df-frec 6621  df-1o 6646  df-er 6766  df-map 6883  df-en 6975  df-fin 6977  df-pnf 8309  df-mnf 8310  df-xr 8311  df-ltxr 8312  df-le 8313  df-sub 8445  df-neg 8446  df-inn 9237  df-n0 9496  df-z 9577  df-uz 9853  df-fz 10342  df-fzo 10476  df-word 11221  df-ndx 13207  df-slot 13208  df-base 13210  df-vtx 16001  df-clwwlk 16379

This theorem is referenced by:  isclwwlk  16381