crctcshlem4 - Metamath Proof Explorer

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Theorem crctcshlem4 29605

Description: Lemma for crctcsh 29609. (Contributed by AV, 10-Mar-2021.)

**Hypotheses**
Ref	Expression
crctcsh.v	⊢ 𝑉 = (Vtx‘𝐺)
crctcsh.i	⊢ 𝐼 = (iEdg‘𝐺)
crctcsh.d	⊢ (𝜑 → 𝐹(Circuits‘𝐺)𝑃)
crctcsh.n	⊢ 𝑁 = (♯‘𝐹)
crctcsh.s	⊢ (𝜑 → 𝑆 ∈ (0..^𝑁))
crctcsh.h	⊢ 𝐻 = (𝐹 cyclShift 𝑆)
crctcsh.q	⊢ 𝑄 = (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ (𝑁 − 𝑆), (𝑃‘(𝑥 + 𝑆)), (𝑃‘((𝑥 + 𝑆) − 𝑁))))

**Assertion**
Ref	Expression
crctcshlem4	⊢ ((𝜑 ∧ 𝑆 = 0) → (𝐻 = 𝐹 ∧ 𝑄 = 𝑃))

Distinct variable groups: 𝑥,𝑁 𝑥,𝑃 𝑥,𝑆 𝜑,𝑥 Allowed substitution hints: 𝑄(𝑥) 𝐹(𝑥) 𝐺(𝑥) 𝐻(𝑥) 𝐼(𝑥) 𝑉(𝑥)

**Proof of Theorem crctcshlem4**
Step	Hyp	Ref	Expression
1		crctcsh.h	. . 3 ⊢ 𝐻 = (𝐹 cyclShift 𝑆)
2		oveq2 7422	. . . 4 ⊢ (𝑆 = 0 → (𝐹 cyclShift 𝑆) = (𝐹 cyclShift 0))
3		crctcsh.d	. . . . . 6 ⊢ (𝜑 → 𝐹(Circuits‘𝐺)𝑃)
4		crctiswlk 29584	. . . . . 6 ⊢ (𝐹(Circuits‘𝐺)𝑃 → 𝐹(Walks‘𝐺)𝑃)
5		crctcsh.i	. . . . . . 7 ⊢ 𝐼 = (iEdg‘𝐺)
6	5	wlkf 29402	. . . . . 6 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝐹 ∈ Word dom 𝐼)
7	3, 4, 6	3syl 18	. . . . 5 ⊢ (𝜑 → 𝐹 ∈ Word dom 𝐼)
8		cshw0 14762	. . . . 5 ⊢ (𝐹 ∈ Word dom 𝐼 → (𝐹 cyclShift 0) = 𝐹)
9	7, 8	syl 17	. . . 4 ⊢ (𝜑 → (𝐹 cyclShift 0) = 𝐹)
10	2, 9	sylan9eqr 2789	. . 3 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝐹 cyclShift 𝑆) = 𝐹)
11	1, 10	eqtrid 2779	. 2 ⊢ ((𝜑 ∧ 𝑆 = 0) → 𝐻 = 𝐹)
12		crctcsh.q	. . 3 ⊢ 𝑄 = (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ (𝑁 − 𝑆), (𝑃‘(𝑥 + 𝑆)), (𝑃‘((𝑥 + 𝑆) − 𝑁))))
13		oveq2 7422	. . . . . . . . 9 ⊢ (𝑆 = 0 → (𝑁 − 𝑆) = (𝑁 − 0))
14		crctcsh.v	. . . . . . . . . . . 12 ⊢ 𝑉 = (Vtx‘𝐺)
15		crctcsh.n	. . . . . . . . . . . 12 ⊢ 𝑁 = (♯‘𝐹)
16	14, 5, 3, 15	crctcshlem1 29602	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
17	16	nn0cnd 12550	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ∈ ℂ)
18	17	subid1d 11576	. . . . . . . . 9 ⊢ (𝜑 → (𝑁 − 0) = 𝑁)
19	13, 18	sylan9eqr 2789	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝑁 − 𝑆) = 𝑁)
20	19	breq2d 5154	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝑥 ≤ (𝑁 − 𝑆) ↔ 𝑥 ≤ 𝑁))
21	20	adantr 480	. . . . . 6 ⊢ (((𝜑 ∧ 𝑆 = 0) ∧ 𝑥 ∈ (0...𝑁)) → (𝑥 ≤ (𝑁 − 𝑆) ↔ 𝑥 ≤ 𝑁))
22		oveq2 7422	. . . . . . . . 9 ⊢ (𝑆 = 0 → (𝑥 + 𝑆) = (𝑥 + 0))
23	22	adantl 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝑥 + 𝑆) = (𝑥 + 0))
24		elfzelz 13519	. . . . . . . . . 10 ⊢ (𝑥 ∈ (0...𝑁) → 𝑥 ∈ ℤ)
25	24	zcnd 12683	. . . . . . . . 9 ⊢ (𝑥 ∈ (0...𝑁) → 𝑥 ∈ ℂ)
26	25	addridd 11430	. . . . . . . 8 ⊢ (𝑥 ∈ (0...𝑁) → (𝑥 + 0) = 𝑥)
27	23, 26	sylan9eq 2787	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑆 = 0) ∧ 𝑥 ∈ (0...𝑁)) → (𝑥 + 𝑆) = 𝑥)
28	27	fveq2d 6895	. . . . . 6 ⊢ (((𝜑 ∧ 𝑆 = 0) ∧ 𝑥 ∈ (0...𝑁)) → (𝑃‘(𝑥 + 𝑆)) = (𝑃‘𝑥))
29	27	fvoveq1d 7436	. . . . . 6 ⊢ (((𝜑 ∧ 𝑆 = 0) ∧ 𝑥 ∈ (0...𝑁)) → (𝑃‘((𝑥 + 𝑆) − 𝑁)) = (𝑃‘(𝑥 − 𝑁)))
30	21, 28, 29	ifbieq12d 4552	. . . . 5 ⊢ (((𝜑 ∧ 𝑆 = 0) ∧ 𝑥 ∈ (0...𝑁)) → if(𝑥 ≤ (𝑁 − 𝑆), (𝑃‘(𝑥 + 𝑆)), (𝑃‘((𝑥 + 𝑆) − 𝑁))) = if(𝑥 ≤ 𝑁, (𝑃‘𝑥), (𝑃‘(𝑥 − 𝑁))))
31	30	mpteq2dva 5242	. . . 4 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ (𝑁 − 𝑆), (𝑃‘(𝑥 + 𝑆)), (𝑃‘((𝑥 + 𝑆) − 𝑁)))) = (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ 𝑁, (𝑃‘𝑥), (𝑃‘(𝑥 − 𝑁)))))
32		elfzle2 13523	. . . . . . . . 9 ⊢ (𝑥 ∈ (0...𝑁) → 𝑥 ≤ 𝑁)
33	32	adantl 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (0...𝑁)) → 𝑥 ≤ 𝑁)
34	33	iftrued 4532	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (0...𝑁)) → if(𝑥 ≤ 𝑁, (𝑃‘𝑥), (𝑃‘(𝑥 − 𝑁))) = (𝑃‘𝑥))
35	34	mpteq2dva 5242	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ 𝑁, (𝑃‘𝑥), (𝑃‘(𝑥 − 𝑁)))) = (𝑥 ∈ (0...𝑁) ↦ (𝑃‘𝑥)))
36	14	wlkp 29404	. . . . . . . 8 ⊢ (𝐹(Walks‘𝐺)𝑃 → 𝑃:(0...(♯‘𝐹))⟶𝑉)
37	3, 4, 36	3syl 18	. . . . . . 7 ⊢ (𝜑 → 𝑃:(0...(♯‘𝐹))⟶𝑉)
38		ffn 6716	. . . . . . . . . . 11 ⊢ (𝑃:(0...(♯‘𝐹))⟶𝑉 → 𝑃 Fn (0...(♯‘𝐹)))
39	15	eqcomi 2736	. . . . . . . . . . . . 13 ⊢ (♯‘𝐹) = 𝑁
40	39	oveq2i 7425	. . . . . . . . . . . 12 ⊢ (0...(♯‘𝐹)) = (0...𝑁)
41	40	fneq2i 6646	. . . . . . . . . . 11 ⊢ (𝑃 Fn (0...(♯‘𝐹)) ↔ 𝑃 Fn (0...𝑁))
42	38, 41	sylib 217	. . . . . . . . . 10 ⊢ (𝑃:(0...(♯‘𝐹))⟶𝑉 → 𝑃 Fn (0...𝑁))
43	42	adantl 481	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑃:(0...(♯‘𝐹))⟶𝑉) → 𝑃 Fn (0...𝑁))
44		dffn5 6951	. . . . . . . . 9 ⊢ (𝑃 Fn (0...𝑁) ↔ 𝑃 = (𝑥 ∈ (0...𝑁) ↦ (𝑃‘𝑥)))
45	43, 44	sylib 217	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑃:(0...(♯‘𝐹))⟶𝑉) → 𝑃 = (𝑥 ∈ (0...𝑁) ↦ (𝑃‘𝑥)))
46	45	eqcomd 2733	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑃:(0...(♯‘𝐹))⟶𝑉) → (𝑥 ∈ (0...𝑁) ↦ (𝑃‘𝑥)) = 𝑃)
47	37, 46	mpdan 686	. . . . . 6 ⊢ (𝜑 → (𝑥 ∈ (0...𝑁) ↦ (𝑃‘𝑥)) = 𝑃)
48	35, 47	eqtrd 2767	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ 𝑁, (𝑃‘𝑥), (𝑃‘(𝑥 − 𝑁)))) = 𝑃)
49	48	adantr 480	. . . 4 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ 𝑁, (𝑃‘𝑥), (𝑃‘(𝑥 − 𝑁)))) = 𝑃)
50	31, 49	eqtrd 2767	. . 3 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝑥 ∈ (0...𝑁) ↦ if(𝑥 ≤ (𝑁 − 𝑆), (𝑃‘(𝑥 + 𝑆)), (𝑃‘((𝑥 + 𝑆) − 𝑁)))) = 𝑃)
51	12, 50	eqtrid 2779	. 2 ⊢ ((𝜑 ∧ 𝑆 = 0) → 𝑄 = 𝑃)
52	11, 51	jca 511	1 ⊢ ((𝜑 ∧ 𝑆 = 0) → (𝐻 = 𝐹 ∧ 𝑄 = 𝑃))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ifcif 4524 class class class wbr 5142 ↦ cmpt 5225 dom cdm 5672 Fn wfn 6537 ⟶wf 6538 ‘cfv 6542 (class class class)co 7414 0cc0 11124 + caddc 11127 ≤ cle 11265 − cmin 11460 ...cfz 13502 ..^cfzo 13645 ♯chash 14307 Word cword 14482 cyclShift ccsh 14756 Vtxcvtx 28783 iEdgciedg 28784 Walkscwlks 29384 Circuitsccrcts 29572

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7732 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 ax-pre-sup 11202

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-ifp 1062 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-rmo 3371 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7863 df-1st 7985 df-2nd 7986 df-frecs 8278 df-wrecs 8309 df-recs 8383 df-rdg 8422 df-1o 8478 df-er 8716 df-map 8836 df-en 8954 df-dom 8955 df-sdom 8956 df-fin 8957 df-sup 9451 df-inf 9452 df-card 9948 df-pnf 11266 df-mnf 11267 df-xr 11268 df-ltxr 11269 df-le 11270 df-sub 11462 df-neg 11463 df-div 11888 df-nn 12229 df-n0 12489 df-z 12575 df-uz 12839 df-rp 12993 df-fz 13503 df-fzo 13646 df-fl 13775 df-mod 13853 df-hash 14308 df-word 14483 df-concat 14539 df-substr 14609 df-pfx 14639 df-csh 14757 df-wlks 29387 df-trls 29480 df-crcts 29574

This theorem is referenced by: crctcshwlk 29607 crctcsh 29609

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