Theorem isclwwlk 26296

Description: Properties of a word to represent a closed walk (in an undirected graph). (Contributed by Alexander van der Vekens, 20-Mar-2018.)

Assertion

Ref	Expression
isclwwlk	⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (𝑊 ∈ (𝑉 ClWWalks 𝐸) ↔ (𝑊 ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸)))

Distinct variable groups:   𝑖,𝐸   𝑖,𝑉   𝑖,𝑊

Allowed substitution hints:   𝑋(𝑖)   𝑌(𝑖)

Proof of Theorem isclwwlk

Dummy variable 𝑤 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		clwwlk 26294	. . 3 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (𝑉 ClWWalks 𝐸) = {𝑤 ∈ Word 𝑉 ∣ (∀𝑖 ∈ (0..^((#‘𝑤) − 1)){(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑤), (𝑤‘0)} ∈ ran 𝐸)})
2	1	eleq2d 2673	. 2 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (𝑊 ∈ (𝑉 ClWWalks 𝐸) ↔ 𝑊 ∈ {𝑤 ∈ Word 𝑉 ∣ (∀𝑖 ∈ (0..^((#‘𝑤) − 1)){(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑤), (𝑤‘0)} ∈ ran 𝐸)}))
3		fveq2 6103	. . . . . . . 8 ⊢ (𝑤 = 𝑊 → (#‘𝑤) = (#‘𝑊))
4	3	oveq1d 6564	. . . . . . 7 ⊢ (𝑤 = 𝑊 → ((#‘𝑤) − 1) = ((#‘𝑊) − 1))
5	4	oveq2d 6565	. . . . . 6 ⊢ (𝑤 = 𝑊 → (0..^((#‘𝑤) − 1)) = (0..^((#‘𝑊) − 1)))
6		fveq1 6102	. . . . . . . 8 ⊢ (𝑤 = 𝑊 → (𝑤‘𝑖) = (𝑊‘𝑖))
7		fveq1 6102	. . . . . . . 8 ⊢ (𝑤 = 𝑊 → (𝑤‘(𝑖 + 1)) = (𝑊‘(𝑖 + 1)))
8	6, 7	preq12d 4220	. . . . . . 7 ⊢ (𝑤 = 𝑊 → {(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} = {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))})
9	8	eleq1d 2672	. . . . . 6 ⊢ (𝑤 = 𝑊 → ({(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ↔ {(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸))
10	5, 9	raleqbidv 3129	. . . . 5 ⊢ (𝑤 = 𝑊 → (∀𝑖 ∈ (0..^((#‘𝑤) − 1)){(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ↔ ∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸))
11		fveq2 6103	. . . . . . 7 ⊢ (𝑤 = 𝑊 → ( lastS ‘𝑤) = ( lastS ‘𝑊))
12		fveq1 6102	. . . . . . 7 ⊢ (𝑤 = 𝑊 → (𝑤‘0) = (𝑊‘0))
13	11, 12	preq12d 4220	. . . . . 6 ⊢ (𝑤 = 𝑊 → {( lastS ‘𝑤), (𝑤‘0)} = {( lastS ‘𝑊), (𝑊‘0)})
14	13	eleq1d 2672	. . . . 5 ⊢ (𝑤 = 𝑊 → ({( lastS ‘𝑤), (𝑤‘0)} ∈ ran 𝐸 ↔ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸))
15	10, 14	anbi12d 743	. . . 4 ⊢ (𝑤 = 𝑊 → ((∀𝑖 ∈ (0..^((#‘𝑤) − 1)){(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑤), (𝑤‘0)} ∈ ran 𝐸) ↔ (∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸)))
16	15	elrab 3331	. . 3 ⊢ (𝑊 ∈ {𝑤 ∈ Word 𝑉 ∣ (∀𝑖 ∈ (0..^((#‘𝑤) − 1)){(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑤), (𝑤‘0)} ∈ ran 𝐸)} ↔ (𝑊 ∈ Word 𝑉 ∧ (∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸)))
17		3anass 1035	. . 3 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸) ↔ (𝑊 ∈ Word 𝑉 ∧ (∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸)))
18	16, 17	bitr4i 266	. 2 ⊢ (𝑊 ∈ {𝑤 ∈ Word 𝑉 ∣ (∀𝑖 ∈ (0..^((#‘𝑤) − 1)){(𝑤‘𝑖), (𝑤‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑤), (𝑤‘0)} ∈ ran 𝐸)} ↔ (𝑊 ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸))
19	2, 18	syl6bb 275	1 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝐸 ∈ 𝑌) → (𝑊 ∈ (𝑉 ClWWalks 𝐸) ↔ (𝑊 ∈ Word 𝑉 ∧ ∀𝑖 ∈ (0..^((#‘𝑊) − 1)){(𝑊‘𝑖), (𝑊‘(𝑖 + 1))} ∈ ran 𝐸 ∧ {( lastS ‘𝑊), (𝑊‘0)} ∈ ran 𝐸)))

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ∀wral 2896  {crab 2900  {cpr 4127  ran crn 5039  ‘cfv 5804  (class class class)co 6549  0cc0 9815  1c1 9816   + caddc 9818   − cmin 10145  ..^cfzo 12334  #chash 12979  Word cword 13146   lastS clsw 13147   ClWWalks cclwwlk 26276

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-er 7629  df-map 7746  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-card 8648  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-n0 11170  df-z 11255  df-uz 11564  df-fz 12198  df-fzo 12335  df-hash 12980  df-word 13154  df-clwwlk 26279

This theorem is referenced by:  clwwlkgt0  26299  clwwlkn2  26303  clwwlknimp  26304  clwlkisclwwlk  26317  clwwlkf  26322  clwwlkext2edg  26330  wwlkext2clwwlk  26331  clwwisshclww  26335  clwlkfclwwlk  26371  extwwlkfablem2  26605  numclwwlkovfel2  26610  numclwwlkovf2ex  26613  numclwwlkovgelim  26616