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Theorem metakunt34 41690

Description: 𝐷 is a permutation. (Contributed by metakunt, 18-Jul-2024.)

**Hypotheses**
Ref	Expression
metakunt34.1	⊢ (𝜑 → 𝑀 ∈ ℕ)
metakunt34.2	⊢ (𝜑 → 𝐼 ∈ ℕ)
metakunt34.3	⊢ (𝜑 → 𝐼 ≤ 𝑀)
metakunt34.4	⊢ 𝐷 = (𝑤 ∈ (1...𝑀) ↦ if(𝑤 = 𝐼, 𝑤, if(𝑤 < 𝐼, ((𝑤 + (𝑀 − 𝐼)) + if(𝐼 ≤ (𝑤 + (𝑀 − 𝐼)), 1, 0)), ((𝑤 − 𝐼) + if(𝐼 ≤ (𝑤 − 𝐼), 1, 0)))))

**Assertion**
Ref	Expression
metakunt34	⊢ (𝜑 → 𝐷:(1...𝑀)–1-1-onto→(1...𝑀))

Distinct variable groups: 𝑤,𝐼 𝑤,𝑀 𝜑,𝑤 Allowed substitution hint: 𝐷(𝑤)

Proof of Theorem metakunt34 Dummy variables 𝑥 𝑧 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		metakunt34.1	. . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ ℕ)
2		metakunt34.2	. . . . . . 7 ⊢ (𝜑 → 𝐼 ∈ ℕ)
3		metakunt34.3	. . . . . . 7 ⊢ (𝜑 → 𝐼 ≤ 𝑀)
4		eqid 2728	. . . . . . 7 ⊢ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))) = (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1))))
5		eqid 2728	. . . . . . 7 ⊢ (𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))) = (𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1))))
6	1, 2, 3, 4, 5	metakunt14 41670	. . . . . 6 ⊢ (𝜑 → ((𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀) ∧ ^◡(𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))) = (𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1))))))
7	6	simpld 494	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀))
8		f1ocnv 6851	. . . . 5 ⊢ ((𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀) → ^◡(𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀))
9	7, 8	syl 17	. . . 4 ⊢ (𝜑 → ^◡(𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀))
10	6	simprd 495	. . . . 5 ⊢ (𝜑 → ^◡(𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))) = (𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))))
11	10	f1oeq1d 6834	. . . 4 ⊢ (𝜑 → (^◡(𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀) ↔ (𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))):(1...𝑀)–1-1-onto→(1...𝑀)))
12	9, 11	mpbid 231	. . 3 ⊢ (𝜑 → (𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))):(1...𝑀)–1-1-onto→(1...𝑀))
13		eqid 2728	. . . . 5 ⊢ (𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) = (𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼)))))
14	1, 2, 3, 13	metakunt25 41681	. . . 4 ⊢ (𝜑 → (𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))):(1...𝑀)–1-1-onto→(1...𝑀))
15		f1oco 6862	. . . 4 ⊢ (((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))):(1...𝑀)–1-1-onto→(1...𝑀) ∧ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))):(1...𝑀)–1-1-onto→(1...𝑀)) → ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1))))):(1...𝑀)–1-1-onto→(1...𝑀))
16	14, 7, 15	syl2anc 583	. . 3 ⊢ (𝜑 → ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1))))):(1...𝑀)–1-1-onto→(1...𝑀))
17		f1oco 6862	. . 3 ⊢ (((𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))):(1...𝑀)–1-1-onto→(1...𝑀) ∧ ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1))))):(1...𝑀)–1-1-onto→(1...𝑀)) → ((𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))) ∘ ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))))):(1...𝑀)–1-1-onto→(1...𝑀))
18	12, 16, 17	syl2anc 583	. 2 ⊢ (𝜑 → ((𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))) ∘ ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))))):(1...𝑀)–1-1-onto→(1...𝑀))
19		metakunt34.4	. . . 4 ⊢ 𝐷 = (𝑤 ∈ (1...𝑀) ↦ if(𝑤 = 𝐼, 𝑤, if(𝑤 < 𝐼, ((𝑤 + (𝑀 − 𝐼)) + if(𝐼 ≤ (𝑤 + (𝑀 − 𝐼)), 1, 0)), ((𝑤 − 𝐼) + if(𝐼 ≤ (𝑤 − 𝐼), 1, 0)))))
20	1, 2, 3, 4, 13, 5, 19	metakunt33 41689	. . 3 ⊢ (𝜑 → ((𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))) ∘ ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))))) = 𝐷)
21	20	f1oeq1d 6834	. 2 ⊢ (𝜑 → (((𝑧 ∈ (1...𝑀) ↦ if(𝑧 = 𝑀, 𝐼, if(𝑧 < 𝐼, 𝑧, (𝑧 + 1)))) ∘ ((𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝑀, if(𝑦 < 𝐼, (𝑦 + (𝑀 − 𝐼)), (𝑦 + (1 − 𝐼))))) ∘ (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1)))))):(1...𝑀)–1-1-onto→(1...𝑀) ↔ 𝐷:(1...𝑀)–1-1-onto→(1...𝑀)))
22	18, 21	mpbid 231	1 ⊢ (𝜑 → 𝐷:(1...𝑀)–1-1-onto→(1...𝑀))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1534 ∈ wcel 2099 ifcif 4529 class class class wbr 5148 ↦ cmpt 5231 ^◡ccnv 5677 ∘ ccom 5682 –1-1-onto→wf1o 6547 (class class class)co 7420 0cc0 11139 1c1 11140 + caddc 11142 < clt 11279 ≤ cle 11280 − cmin 11475 ℕcn 12243 ...cfz 13517

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-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-cnex 11195 ax-resscn 11196 ax-1cn 11197 ax-icn 11198 ax-addcl 11199 ax-addrcl 11200 ax-mulcl 11201 ax-mulrcl 11202 ax-mulcom 11203 ax-addass 11204 ax-mulass 11205 ax-distr 11206 ax-i2m1 11207 ax-1ne0 11208 ax-1rid 11209 ax-rnegex 11210 ax-rrecex 11211 ax-cnre 11212 ax-pre-lttri 11213 ax-pre-lttrn 11214 ax-pre-ltadd 11215 ax-pre-mulgt0 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-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-op 4636 df-uni 4909 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 8287 df-wrecs 8318 df-recs 8392 df-rdg 8431 df-er 8725 df-en 8965 df-dom 8966 df-sdom 8967 df-pnf 11281 df-mnf 11282 df-xr 11283 df-ltxr 11284 df-le 11285 df-sub 11477 df-neg 11478 df-nn 12244 df-n0 12504 df-z 12590 df-uz 12854 df-rp 13008 df-fz 13518 df-fzo 13661

This theorem is referenced by: (None)

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