Theorem wlk1walkdom 16514

Description: A walk is a 1-walk "on the edge level" according to Aksoy et al. (Contributed by AV, 30-Dec-2020.)

Hypothesis

Ref	Expression
wlk1walk.i	|- I = (iEdg ` G )

Assertion

Ref	Expression
wlk1walkdom	|- ( F (Walks ` G ) P -> A. k e. ( 1..^ (♯ ` F ) ) 1o ~<_ ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) )

Distinct variable groups:   k, F   k, G   P, k

Allowed substitution hint:   I( k)

Proof of Theorem wlk1walkdom

Dummy variable i is distinct from all other variables.

Step	Hyp	Ref	Expression
1		wlk1walk.i	. . . . . . 7 |- I = (iEdg ` G )
2		wlkv 16481	. . . . . . . . 9 |- ( F (Walks ` G ) P -> ( G e. _V /\ F e. _V /\ P e. _V ) )
3	2	simp1d 1040	. . . . . . . 8 |- ( F (Walks ` G ) P -> G e. _V )
4		iedgex 16174	. . . . . . . 8 |- ( G e. _V -> (iEdg ` G ) e. _V )
5	3, 4	syl 14	. . . . . . 7 |- ( F (Walks ` G ) P -> (iEdg ` G ) e. _V )
6	1, 5	eqeltrid 2325	. . . . . 6 |- ( F (Walks ` G ) P -> I e. _V )
7	6	adantr 276	. . . . 5 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> I e. _V )
8	2	simp2d 1041	. . . . . . 7 |- ( F (Walks ` G ) P -> F e. _V )
9	8	adantr 276	. . . . . 6 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> F e. _V )
10		elfzoelz 10532	. . . . . . . 8 |- ( k e. ( 1..^ (♯ ` F ) ) -> k e. ZZ )
11	10	adantl 277	. . . . . . 7 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> k e. ZZ )
12		peano2zm 9661	. . . . . . 7 |- ( k e. ZZ -> ( k - 1 ) e. ZZ )
13	11, 12	syl 14	. . . . . 6 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( k - 1 ) e. ZZ )
14		fvexg 5709	. . . . . 6 |- ( ( F e. _V /\ ( k - 1 ) e. ZZ ) -> ( F ` ( k - 1 ) ) e. _V )
15	9, 13, 14	syl2anc 415	. . . . 5 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( F ` ( k - 1 ) ) e. _V )
16		fvexg 5709	. . . . 5 |- ( ( I e. _V /\ ( F ` ( k - 1 ) ) e. _V ) -> ( I ` ( F ` ( k - 1 ) ) ) e. _V )
17	7, 15, 16	syl2anc 415	. . . 4 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( I ` ( F ` ( k - 1 ) ) ) e. _V )
18		inex1g 4264	. . . 4 |- ( ( I ` ( F ` ( k - 1 ) ) ) e. _V -> ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) e. _V )
19	17, 18	syl 14	. . 3 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) e. _V )
20		eqid 2238	. . . . . . . 8 |- (Vtx ` G ) = (Vtx ` G )
21		eqid 2238	. . . . . . . 8 |- (iEdg ` G ) = (iEdg ` G )
22	20, 21	wlkprop 16482	. . . . . . 7 |- ( F (Walks ` G ) P -> ( F e. Word dom (iEdg ` G ) /\ P : ( 0 ... (♯ ` F ) ) --> (Vtx ` G ) /\ A. i e. ( 0..^ (♯ ` F ) )if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) ) )
23	22	simp3d 1042	. . . . . 6 |- ( F (Walks ` G ) P -> A. i e. ( 0..^ (♯ ` F ) )if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) )
24		elfzofz 10548	. . . . . . 7 |- ( k e. ( 1..^ (♯ ` F ) ) -> k e. ( 1 ... (♯ ` F ) ) )
25		fz1fzo0m1 10579	. . . . . . 7 |- ( k e. ( 1 ... (♯ ` F ) ) -> ( k - 1 ) e. ( 0..^ (♯ ` F ) ) )
26		wkslem1 16475	. . . . . . . 8 |- ( i = ( k - 1 ) -> (if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) <-> if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
27	26	rspcv 2925	. . . . . . 7 |- ( ( k - 1 ) e. ( 0..^ (♯ ` F ) ) -> ( A. i e. ( 0..^ (♯ ` F ) )if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) -> if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
28	24, 25, 27	3syl 17	. . . . . 6 |- ( k e. ( 1..^ (♯ ` F ) ) -> ( A. i e. ( 0..^ (♯ ` F ) )if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) -> if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
29	23, 28	mpan9 281	. . . . 5 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) )
30		fzo0ss1 10561	. . . . . . . . 9 |- ( 1..^ (♯ ` F ) ) C_ ( 0..^ (♯ ` F ) )
31	30	sseli 3244	. . . . . . . 8 |- ( k e. ( 1..^ (♯ ` F ) ) -> k e. ( 0..^ (♯ ` F ) ) )
32		wkslem1 16475	. . . . . . . . 9 |- ( i = k -> (if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) <-> if- ( ( P ` k ) = ( P ` ( k + 1 ) ) , ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } , { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) )
33	32	rspcv 2925	. . . . . . . 8 |- ( k e. ( 0..^ (♯ ` F ) ) -> ( A. i e. ( 0..^ (♯ ` F ) )if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) -> if- ( ( P ` k ) = ( P ` ( k + 1 ) ) , ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } , { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) )
34	31, 33	syl 14	. . . . . . 7 |- ( k e. ( 1..^ (♯ ` F ) ) -> ( A. i e. ( 0..^ (♯ ` F ) )if- ( ( P ` i ) = ( P ` ( i + 1 ) ) , ( (iEdg ` G ) ` ( F ` i ) ) = { ( P ` i ) } , { ( P ` i ) , ( P ` ( i + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` i ) ) ) -> if- ( ( P ` k ) = ( P ` ( k + 1 ) ) , ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } , { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) )
35	23, 34	mpan9 281	. . . . . 6 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> if- ( ( P ` k ) = ( P ` ( k + 1 ) ) , ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } , { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) )
36		df-ifp 991	. . . . . . 7 |- (if- ( ( P ` k ) = ( P ` ( k + 1 ) ) , ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } , { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) <-> ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) )
37		zcn 9628	. . . . . . . . . . 11 |- ( k e. ZZ -> k e. CC )
38		eqidd 2239	. . . . . . . . . . . 12 |- ( k e. CC -> ( k - 1 ) = ( k - 1 ) )
39		npcan1 8695	. . . . . . . . . . . 12 |- ( k e. CC -> ( ( k - 1 ) + 1 ) = k )
40		wkslem2 16476	. . . . . . . . . . . 12 |- ( ( ( k - 1 ) = ( k - 1 ) /\ ( ( k - 1 ) + 1 ) = k ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> if- ( ( P ` ( k - 1 ) ) = ( P ` k ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
41	38, 39, 40	syl2anc 415	. . . . . . . . . . 11 |- ( k e. CC -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> if- ( ( P ` ( k - 1 ) ) = ( P ` k ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
42	10, 37, 41	3syl 17	. . . . . . . . . 10 |- ( k e. ( 1..^ (♯ ` F ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> if- ( ( P ` ( k - 1 ) ) = ( P ` k ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
43	42	adantl 277	. . . . . . . . 9 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> if- ( ( P ` ( k - 1 ) ) = ( P ` k ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
44		df-ifp 991	. . . . . . . . . 10 |- (if- ( ( P ` ( k - 1 ) ) = ( P ` k ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) \/ ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) )
45		anass 405	. . . . . . . . . . . . . . 15 |- ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) /\ ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) ) <-> ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } /\ ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) ) ) )
46		sneq 3716	. . . . . . . . . . . . . . . . . . . 20 |- ( ( P ` ( k - 1 ) ) = ( P ` k ) -> { ( P ` ( k - 1 ) ) } = { ( P ` k ) } )
47	46	eqeq2d 2250	. . . . . . . . . . . . . . . . . . 19 |- ( ( P ` ( k - 1 ) ) = ( P ` k ) -> ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } <-> ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } ) )
48	47	biimpa 296	. . . . . . . . . . . . . . . . . 18 |- ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } )
49	2	simp3d 1042	. . . . . . . . . . . . . . . . . . . . . . 23 |- ( F (Walks ` G ) P -> P e. _V )
50	49	adantr 276	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> P e. _V )
51		vex 2824	. . . . . . . . . . . . . . . . . . . . . 22 |- k e. _V
52		fvexg 5709	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( P e. _V /\ k e. _V ) -> ( P ` k ) e. _V )
53	50, 51, 52	sylancl 417	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( P ` k ) e. _V )
54		snidg 3734	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( P ` k ) e. _V -> ( P ` k ) e. { ( P ` k ) } )
55	53, 54	syl 14	. . . . . . . . . . . . . . . . . . . 20 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( P ` k ) e. { ( P ` k ) } )
56	1	fveq1i 5691	. . . . . . . . . . . . . . . . . . . . . 22 |- ( I ` ( F ` ( k - 1 ) ) ) = ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) )
57	56	eleq2i 2305	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) <-> ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) )
58		eleq2 2302	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) <-> ( P ` k ) e. { ( P ` k ) } ) )
59	57, 58	bitrid 192	. . . . . . . . . . . . . . . . . . . 20 |- ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) <-> ( P ` k ) e. { ( P ` k ) } ) )
60	55, 59	syl5ibrcom 157	. . . . . . . . . . . . . . . . . . 19 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } -> ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) ) )
61	55	adantr 276	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( P ` k ) e. { ( P ` k ) } )
62		eleq2 2302	. . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) <-> ( P ` k ) e. { ( P ` k ) } ) )
63	62	adantl 277	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) <-> ( P ` k ) e. { ( P ` k ) } ) )
64	61, 63	mpbird 167	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) )
65	1	fveq1i 5691	. . . . . . . . . . . . . . . . . . . . 21 |- ( I ` ( F ` k ) ) = ( (iEdg ` G ) ` ( F ` k ) )
66	64, 65	eleqtrrdi 2332	. . . . . . . . . . . . . . . . . . . 20 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( P ` k ) e. ( I ` ( F ` k ) ) )
67	66	ex 115	. . . . . . . . . . . . . . . . . . 19 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( P ` k ) e. ( I ` ( F ` k ) ) ) )
68	60, 67	anim12d 335	. . . . . . . . . . . . . . . . . 18 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
69	48, 68	sylani 410	. . . . . . . . . . . . . . . . 17 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
70	69	ancomsd 269	. . . . . . . . . . . . . . . 16 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } /\ ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
71	70	adantld 278	. . . . . . . . . . . . . . 15 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } /\ ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
72	45, 71	biimtrid 152	. . . . . . . . . . . . . 14 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) /\ ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
73	72	expd 258	. . . . . . . . . . . . 13 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
74	11	peano2zd 9750	. . . . . . . . . . . . . . . . . . . . . . . 24 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( k + 1 ) e. ZZ )
75		fvexg 5709	. . . . . . . . . . . . . . . . . . . . . . . 24 |- ( ( P e. _V /\ ( k + 1 ) e. ZZ ) -> ( P ` ( k + 1 ) ) e. _V )
76	50, 74, 75	syl2anc 415	. . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( P ` ( k + 1 ) ) e. _V )
77		prssg 3867	. . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( ( P ` k ) e. _V /\ ( P ` ( k + 1 ) ) e. _V ) -> ( ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) /\ ( P ` ( k + 1 ) ) e. ( (iEdg ` G ) ` ( F ` k ) ) ) <-> { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) )
78	53, 76, 77	syl2anc 415	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) /\ ( P ` ( k + 1 ) ) e. ( (iEdg ` G ) ` ( F ` k ) ) ) <-> { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) )
79	78	biimpar 297	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) /\ ( P ` ( k + 1 ) ) e. ( (iEdg ` G ) ` ( F ` k ) ) ) )
80	79	simpld 112	. . . . . . . . . . . . . . . . . . . 20 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) )
81	1	eqcomi 2242	. . . . . . . . . . . . . . . . . . . . . . 23 |- (iEdg ` G ) = I
82	81	fveq1i 5691	. . . . . . . . . . . . . . . . . . . . . 22 |- ( (iEdg ` G ) ` ( F ` k ) ) = ( I ` ( F ` k ) )
83	82	eleq2i 2305	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) <-> ( P ` k ) e. ( I ` ( F ` k ) ) )
84	83	biimpi 120	. . . . . . . . . . . . . . . . . . . 20 |- ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( P ` k ) e. ( I ` ( F ` k ) ) )
85	80, 84	syl 14	. . . . . . . . . . . . . . . . . . 19 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( P ` k ) e. ( I ` ( F ` k ) ) )
86	85	ex 115	. . . . . . . . . . . . . . . . . 18 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) -> ( P ` k ) e. ( I ` ( F ` k ) ) ) )
87	60, 86	anim12d 335	. . . . . . . . . . . . . . . . 17 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
88	87	expd 258	. . . . . . . . . . . . . . . 16 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` k ) } -> ( { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
89	48, 88	syl5 32	. . . . . . . . . . . . . . 15 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
90	89	com23 78	. . . . . . . . . . . . . 14 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
91	90	adantld 278	. . . . . . . . . . . . 13 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
92	73, 91	jaod 729	. . . . . . . . . . . 12 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
93	92	com23 78	. . . . . . . . . . 11 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
94		fvexg 5709	. . . . . . . . . . . . . . . . . . 19 |- ( ( P e. _V /\ ( k - 1 ) e. ZZ ) -> ( P ` ( k - 1 ) ) e. _V )
95	50, 13, 94	syl2anc 415	. . . . . . . . . . . . . . . . . 18 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( P ` ( k - 1 ) ) e. _V )
96		prssg 3867	. . . . . . . . . . . . . . . . . 18 |- ( ( ( P ` ( k - 1 ) ) e. _V /\ ( P ` k ) e. _V ) -> ( ( ( P ` ( k - 1 ) ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) )
97	95, 53, 96	syl2anc 415	. . . . . . . . . . . . . . . . 17 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` ( k - 1 ) ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) <-> { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) )
98	81	fveq1i 5691	. . . . . . . . . . . . . . . . . . . . . . 23 |- ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = ( I ` ( F ` ( k - 1 ) ) )
99	98	eleq2i 2305	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) <-> ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) )
100	99	biimpi 120	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) -> ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) )
101	100	a1i 9	. . . . . . . . . . . . . . . . . . . 20 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) -> ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) ) )
102	101, 67	anim12d 335	. . . . . . . . . . . . . . . . . . 19 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
103	102	expd 258	. . . . . . . . . . . . . . . . . 18 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) -> ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
104	103	adantld 278	. . . . . . . . . . . . . . . . 17 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` ( k - 1 ) ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
105	97, 104	sylbird 170	. . . . . . . . . . . . . . . 16 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) -> ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
106	105	adantld 278	. . . . . . . . . . . . . . 15 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
107	106	com23 78	. . . . . . . . . . . . . 14 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
108	107	adantld 278	. . . . . . . . . . . . 13 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
109	99, 83	anbi12i 464	. . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) ) <-> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) )
110	109	biimpi 120	. . . . . . . . . . . . . . . . . . . . . 22 |- ( ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) )
111	110	ex 115	. . . . . . . . . . . . . . . . . . . . 21 |- ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
112	111	adantl 277	. . . . . . . . . . . . . . . . . . . 20 |- ( ( ( P ` ( k - 1 ) ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
113	97, 112	biimtrrdi 164	. . . . . . . . . . . . . . . . . . 19 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
114	113	adantld 278	. . . . . . . . . . . . . . . . . 18 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
115	114	com23 78	. . . . . . . . . . . . . . . . 17 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
116	115	adantr 276	. . . . . . . . . . . . . . . 16 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( P ` k ) e. ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
117	80, 116	mpd 13	. . . . . . . . . . . . . . 15 |- ( ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
118	117	ex 115	. . . . . . . . . . . . . 14 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
119	118	adantld 278	. . . . . . . . . . . . 13 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
120	108, 119	jaod 729	. . . . . . . . . . . 12 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
121	120	com23 78	. . . . . . . . . . 11 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
122	93, 121	jaod 729	. . . . . . . . . 10 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( ( ( P ` ( k - 1 ) ) = ( P ` k ) /\ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } ) \/ ( -. ( P ` ( k - 1 ) ) = ( P ` k ) /\ { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
123	44, 122	biimtrid 152	. . . . . . . . 9 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` k ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` k ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
124	43, 123	sylbid 150	. . . . . . . 8 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
125	124	com3r 79	. . . . . . 7 |- ( ( ( ( P ` k ) = ( P ` ( k + 1 ) ) /\ ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } ) \/ ( -. ( P ` k ) = ( P ` ( k + 1 ) ) /\ { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) ) -> ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
126	36, 125	sylbi 121	. . . . . 6 |- (if- ( ( P ` k ) = ( P ` ( k + 1 ) ) , ( (iEdg ` G ) ` ( F ` k ) ) = { ( P ` k ) } , { ( P ` k ) , ( P ` ( k + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` k ) ) ) -> ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) ) )
127	35, 126	mpcom 36	. . . . 5 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> (if- ( ( P ` ( k - 1 ) ) = ( P ` ( ( k - 1 ) + 1 ) ) , ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) = { ( P ` ( k - 1 ) ) } , { ( P ` ( k - 1 ) ) , ( P ` ( ( k - 1 ) + 1 ) ) } C_ ( (iEdg ` G ) ` ( F ` ( k - 1 ) ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) ) )
128	29, 127	mpd 13	. . . 4 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) )
129		elin 3412	. . . 4 |- ( ( P ` k ) e. ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) <-> ( ( P ` k ) e. ( I ` ( F ` ( k - 1 ) ) ) /\ ( P ` k ) e. ( I ` ( F ` k ) ) ) )
130	128, 129	sylibr 134	. . 3 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> ( P ` k ) e. ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) )
131		dom1oi 7107	. . 3 |- ( ( ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) e. _V /\ ( P ` k ) e. ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) ) -> 1o ~<_ ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) )
132	19, 130, 131	syl2anc 415	. 2 |- ( ( F (Walks ` G ) P /\ k e. ( 1..^ (♯ ` F ) ) ) -> 1o ~<_ ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) )
133	132	ralrimiva 2623	1 |- ( F (Walks ` G ) P -> A. k e. ( 1..^ (♯ ` F ) ) 1o ~<_ ( ( I ` ( F ` ( k - 1 ) ) ) i^i ( I ` ( F ` k ) ) ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 720  if-wif 990   = wceq 1402   e. wcel 2209   A.wral 2528   _Vcvv 2821   i^i cin 3219   C_ wss 3220   {csn 3705   {cpr 3706   class class class wbr 4125   dom cdm 4769   -->wf 5368   ` cfv 5372  (class class class)co 6075   1oc1o 6670   ~<_ cdom 7011   CCcc 8167   0cc0 8169   1c1 8170   + caddc 8172   - cmin 8487   ZZcz 9623   ...cfz 10390  ..^cfzo 10527  ♯chash 11192  Word cword 11282  Vtxcvtx 16167  iEdgciedg 16168  Walkscwlks 16472

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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-1rid 8276  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-apti 8284  ax-pre-ltadd 8285

This theorem depends on definitions:  df-bi 117  df-dc 847  df-ifp 991  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-recs 6566  df-frec 6652  df-1o 6677  df-er 6797  df-map 6914  df-en 7013  df-dom 7014  df-fin 7015  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-inn 9284  df-2 9342  df-3 9343  df-4 9344  df-5 9345  df-6 9346  df-7 9347  df-8 9348  df-9 9349  df-n0 9543  df-z 9624  df-dec 9757  df-uz 9901  df-fz 10391  df-fzo 10528  df-ihash 11193  df-word 11283  df-ndx 13333  df-slot 13334  df-base 13336  df-edgf 16160  df-vtx 16169  df-iedg 16170  df-wlks 16473

This theorem is referenced by: (None)