tocyc01 - Mathbox for Thierry Arnoux

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Theorem tocyc01 32839

Description: Permutation cycles built from the empty set or a singleton are the identity. (Contributed by Thierry Arnoux, 21-Nov-2023.)

**Hypothesis**
Ref	Expression
tocyc01.1	⊢ 𝐶 = (toCyc‘𝐷)

**Assertion**
Ref	Expression
tocyc01	⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → (𝐶‘𝑊) = ( I ↾ 𝐷))

Proof of Theorem tocyc01 Dummy variable 𝑤 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		tocyc01.1	. . . . 5 ⊢ 𝐶 = (toCyc‘𝐷)
2		simpl 482	. . . . 5 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝐷 ∈ 𝑉)
3		simpr 484	. . . . . . . . 9 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1})))
4	3	elin1d 4198	. . . . . . . 8 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝑊 ∈ dom 𝐶)
5		eqid 2728	. . . . . . . . . 10 ⊢ (SymGrp‘𝐷) = (SymGrp‘𝐷)
6		eqid 2728	. . . . . . . . . 10 ⊢ (Base‘(SymGrp‘𝐷)) = (Base‘(SymGrp‘𝐷))
7	1, 5, 6	tocycf 32838	. . . . . . . . 9 ⊢ (𝐷 ∈ 𝑉 → 𝐶:{𝑤 ∈ Word 𝐷 ∣ 𝑤:dom 𝑤–1-1→𝐷}⟶(Base‘(SymGrp‘𝐷)))
8		fdm 6731	. . . . . . . . 9 ⊢ (𝐶:{𝑤 ∈ Word 𝐷 ∣ 𝑤:dom 𝑤–1-1→𝐷}⟶(Base‘(SymGrp‘𝐷)) → dom 𝐶 = {𝑤 ∈ Word 𝐷 ∣ 𝑤:dom 𝑤–1-1→𝐷})
9	2, 7, 8	3syl 18	. . . . . . . 8 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → dom 𝐶 = {𝑤 ∈ Word 𝐷 ∣ 𝑤:dom 𝑤–1-1→𝐷})
10	4, 9	eleqtrd 2831	. . . . . . 7 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝑊 ∈ {𝑤 ∈ Word 𝐷 ∣ 𝑤:dom 𝑤–1-1→𝐷})
11		id 22	. . . . . . . . 9 ⊢ (𝑤 = 𝑊 → 𝑤 = 𝑊)
12		dmeq 5906	. . . . . . . . 9 ⊢ (𝑤 = 𝑊 → dom 𝑤 = dom 𝑊)
13		eqidd 2729	. . . . . . . . 9 ⊢ (𝑤 = 𝑊 → 𝐷 = 𝐷)
14	11, 12, 13	f1eq123d 6831	. . . . . . . 8 ⊢ (𝑤 = 𝑊 → (𝑤:dom 𝑤–1-1→𝐷 ↔ 𝑊:dom 𝑊–1-1→𝐷))
15	14	elrab 3682	. . . . . . 7 ⊢ (𝑊 ∈ {𝑤 ∈ Word 𝐷 ∣ 𝑤:dom 𝑤–1-1→𝐷} ↔ (𝑊 ∈ Word 𝐷 ∧ 𝑊:dom 𝑊–1-1→𝐷))
16	10, 15	sylib 217	. . . . . 6 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → (𝑊 ∈ Word 𝐷 ∧ 𝑊:dom 𝑊–1-1→𝐷))
17	16	simpld 494	. . . . 5 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝑊 ∈ Word 𝐷)
18	16	simprd 495	. . . . 5 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝑊:dom 𝑊–1-1→𝐷)
19	1, 2, 17, 18	tocycfv 32830	. . . 4 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → (𝐶‘𝑊) = (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)))
20	19	adantr 480	. . 3 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 0) → (𝐶‘𝑊) = (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)))
21		hasheq0 14354	. . . . . 6 ⊢ (𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1})) → ((♯‘𝑊) = 0 ↔ 𝑊 = ∅))
22	3, 21	syl 17	. . . . 5 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → ((♯‘𝑊) = 0 ↔ 𝑊 = ∅))
23	22	biimpa 476	. . . 4 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 0) → 𝑊 = ∅)
24		rneq 5938	. . . . . . . . . 10 ⊢ (𝑊 = ∅ → ran 𝑊 = ran ∅)
25		rn0 5928	. . . . . . . . . 10 ⊢ ran ∅ = ∅
26	24, 25	eqtrdi 2784	. . . . . . . . 9 ⊢ (𝑊 = ∅ → ran 𝑊 = ∅)
27	26	difeq2d 4120	. . . . . . . 8 ⊢ (𝑊 = ∅ → (𝐷 ∖ ran 𝑊) = (𝐷 ∖ ∅))
28		dif0 4373	. . . . . . . 8 ⊢ (𝐷 ∖ ∅) = 𝐷
29	27, 28	eqtrdi 2784	. . . . . . 7 ⊢ (𝑊 = ∅ → (𝐷 ∖ ran 𝑊) = 𝐷)
30	29	reseq2d 5985	. . . . . 6 ⊢ (𝑊 = ∅ → ( I ↾ (𝐷 ∖ ran 𝑊)) = ( I ↾ 𝐷))
31		cnveq 5876	. . . . . . . . 9 ⊢ (𝑊 = ∅ → ^◡𝑊 = ^◡∅)
32		cnv0 6145	. . . . . . . . 9 ⊢ ^◡∅ = ∅
33	31, 32	eqtrdi 2784	. . . . . . . 8 ⊢ (𝑊 = ∅ → ^◡𝑊 = ∅)
34	33	coeq2d 5865	. . . . . . 7 ⊢ (𝑊 = ∅ → ((𝑊 cyclShift 1) ∘ ^◡𝑊) = ((𝑊 cyclShift 1) ∘ ∅))
35		co02 6264	. . . . . . 7 ⊢ ((𝑊 cyclShift 1) ∘ ∅) = ∅
36	34, 35	eqtrdi 2784	. . . . . 6 ⊢ (𝑊 = ∅ → ((𝑊 cyclShift 1) ∘ ^◡𝑊) = ∅)
37	30, 36	uneq12d 4163	. . . . 5 ⊢ (𝑊 = ∅ → (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)) = (( I ↾ 𝐷) ∪ ∅))
38		un0 4391	. . . . 5 ⊢ (( I ↾ 𝐷) ∪ ∅) = ( I ↾ 𝐷)
39	37, 38	eqtrdi 2784	. . . 4 ⊢ (𝑊 = ∅ → (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)) = ( I ↾ 𝐷))
40	23, 39	syl 17	. . 3 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 0) → (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)) = ( I ↾ 𝐷))
41	20, 40	eqtrd 2768	. 2 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 0) → (𝐶‘𝑊) = ( I ↾ 𝐷))
42	19	adantr 480	. . 3 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (𝐶‘𝑊) = (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)))
43	17	adantr 480	. . . . . . 7 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → 𝑊 ∈ Word 𝐷)
44		1zzd 12623	. . . . . . 7 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → 1 ∈ ℤ)
45		simpr 484	. . . . . . 7 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (♯‘𝑊) = 1)
46		1cshid 32680	. . . . . . 7 ⊢ ((𝑊 ∈ Word 𝐷 ∧ 1 ∈ ℤ ∧ (♯‘𝑊) = 1) → (𝑊 cyclShift 1) = 𝑊)
47	43, 44, 45, 46	syl3anc 1369	. . . . . 6 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (𝑊 cyclShift 1) = 𝑊)
48	47	coeq1d 5864	. . . . 5 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → ((𝑊 cyclShift 1) ∘ ^◡𝑊) = (𝑊 ∘ ^◡𝑊))
49		wrdf 14501	. . . . . 6 ⊢ (𝑊 ∈ Word 𝐷 → 𝑊:(0..^(♯‘𝑊))⟶𝐷)
50		ffun 6725	. . . . . 6 ⊢ (𝑊:(0..^(♯‘𝑊))⟶𝐷 → Fun 𝑊)
51		funcocnv2 6864	. . . . . 6 ⊢ (Fun 𝑊 → (𝑊 ∘ ^◡𝑊) = ( I ↾ ran 𝑊))
52	43, 49, 50, 51	4syl 19	. . . . 5 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (𝑊 ∘ ^◡𝑊) = ( I ↾ ran 𝑊))
53	48, 52	eqtrd 2768	. . . 4 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → ((𝑊 cyclShift 1) ∘ ^◡𝑊) = ( I ↾ ran 𝑊))
54	53	uneq2d 4162	. . 3 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ((𝑊 cyclShift 1) ∘ ^◡𝑊)) = (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ( I ↾ ran 𝑊)))
55		resundi 5999	. . . 4 ⊢ ( I ↾ ((𝐷 ∖ ran 𝑊) ∪ ran 𝑊)) = (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ( I ↾ ran 𝑊))
56		frn 6729	. . . . . . 7 ⊢ (𝑊:(0..^(♯‘𝑊))⟶𝐷 → ran 𝑊 ⊆ 𝐷)
57		undifr 4483	. . . . . . 7 ⊢ (ran 𝑊 ⊆ 𝐷 ↔ ((𝐷 ∖ ran 𝑊) ∪ ran 𝑊) = 𝐷)
58	56, 57	sylib 217	. . . . . 6 ⊢ (𝑊:(0..^(♯‘𝑊))⟶𝐷 → ((𝐷 ∖ ran 𝑊) ∪ ran 𝑊) = 𝐷)
59	43, 49, 58	3syl 18	. . . . 5 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → ((𝐷 ∖ ran 𝑊) ∪ ran 𝑊) = 𝐷)
60	59	reseq2d 5985	. . . 4 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → ( I ↾ ((𝐷 ∖ ran 𝑊) ∪ ran 𝑊)) = ( I ↾ 𝐷))
61	55, 60	eqtr3id 2782	. . 3 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (( I ↾ (𝐷 ∖ ran 𝑊)) ∪ ( I ↾ ran 𝑊)) = ( I ↾ 𝐷))
62	42, 54, 61	3eqtrd 2772	. 2 ⊢ (((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) ∧ (♯‘𝑊) = 1) → (𝐶‘𝑊) = ( I ↾ 𝐷))
63	3	elin2d 4199	. . . . 5 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → 𝑊 ∈ (^◡♯ “ {0, 1}))
64		hashf 14329	. . . . . 6 ⊢ ♯:V⟶(ℕ₀ ∪ {+∞})
65		ffn 6722	. . . . . 6 ⊢ (♯:V⟶(ℕ₀ ∪ {+∞}) → ♯ Fn V)
66		elpreima 7067	. . . . . 6 ⊢ (♯ Fn V → (𝑊 ∈ (^◡♯ “ {0, 1}) ↔ (𝑊 ∈ V ∧ (♯‘𝑊) ∈ {0, 1})))
67	64, 65, 66	mp2b 10	. . . . 5 ⊢ (𝑊 ∈ (^◡♯ “ {0, 1}) ↔ (𝑊 ∈ V ∧ (♯‘𝑊) ∈ {0, 1}))
68	63, 67	sylib 217	. . . 4 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → (𝑊 ∈ V ∧ (♯‘𝑊) ∈ {0, 1}))
69	68	simprd 495	. . 3 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → (♯‘𝑊) ∈ {0, 1})
70		elpri 4651	. . 3 ⊢ ((♯‘𝑊) ∈ {0, 1} → ((♯‘𝑊) = 0 ∨ (♯‘𝑊) = 1))
71	69, 70	syl 17	. 2 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → ((♯‘𝑊) = 0 ∨ (♯‘𝑊) = 1))
72	41, 62, 71	mpjaodan 957	1 ⊢ ((𝐷 ∈ 𝑉 ∧ 𝑊 ∈ (dom 𝐶 ∩ (^◡♯ “ {0, 1}))) → (𝐶‘𝑊) = ( I ↾ 𝐷))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∨ wo 846 = wceq 1534 ∈ wcel 2099 {crab 3429 Vcvv 3471 ∖ cdif 3944 ∪ cun 3945 ∩ cin 3946 ⊆ wss 3947 ∅c0 4323 {csn 4629 {cpr 4631 I cid 5575 ^◡ccnv 5677 dom cdm 5678 ran crn 5679 ↾ cres 5680 “ cima 5681 ∘ ccom 5682 Fun wfun 6542 Fn wfn 6543 ⟶wf 6544 –1-1→wf1 6545 ‘cfv 6548 (class class class)co 7420 0cc0 11138 1c1 11139 +∞cpnf 11275 ℕ₀cn0 12502 ℤcz 12588 ..^cfzo 13659 ♯chash 14321 Word cword 14496 cyclShift ccsh 14770 Basecbs 17179 SymGrpcsymg 19320 toCycctocyc 32827

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 2167 ax-ext 2699 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3373 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4909 df-int 4950 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-riota 7376 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7871 df-1st 7993 df-2nd 7994 df-frecs 8286 df-wrecs 8317 df-recs 8391 df-rdg 8430 df-1o 8486 df-er 8724 df-map 8846 df-en 8964 df-dom 8965 df-sdom 8966 df-fin 8967 df-sup 9465 df-inf 9466 df-card 9962 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-div 11902 df-nn 12243 df-2 12305 df-3 12306 df-4 12307 df-5 12308 df-6 12309 df-7 12310 df-8 12311 df-9 12312 df-n0 12503 df-xnn0 12575 df-z 12589 df-uz 12853 df-rp 13007 df-fz 13517 df-fzo 13660 df-fl 13789 df-mod 13867 df-hash 14322 df-word 14497 df-concat 14553 df-substr 14623 df-pfx 14653 df-csh 14771 df-struct 17115 df-sets 17132 df-slot 17150 df-ndx 17162 df-base 17180 df-ress 17209 df-plusg 17245 df-tset 17251 df-efmnd 18820 df-symg 19321 df-tocyc 32828

This theorem is referenced by: tocyccntz 32865

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