Theorem metakunt8 42225

Description: C is the left inverse for A. (Contributed by metakunt, 24-May-2024.)

Hypotheses

Ref	Expression
metakunt8.1	⊢ (𝜑 → 𝑀 ∈ ℕ)
metakunt8.2	⊢ (𝜑 → 𝐼 ∈ ℕ)
metakunt8.3	⊢ (𝜑 → 𝐼 ≤ 𝑀)
metakunt8.4	⊢ 𝐴 = (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1))))
metakunt8.5	⊢ 𝐶 = (𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝐼, if(𝑦 < 𝐼, 𝑦, (𝑦 + 1))))
metakunt8.6	⊢ (𝜑 → 𝑋 ∈ (1...𝑀))

Assertion

Ref	Expression
metakunt8	⊢ ((𝜑 ∧ 𝐼 < 𝑋) → (𝐶‘(𝐴‘𝑋)) = 𝑋)

Distinct variable groups:   𝑦,𝐴   𝑥,𝐼   𝑦,𝐼   𝑥,𝑀   𝑦,𝑀   𝑥,𝑋   𝑦,𝑋   𝜑,𝑥   𝜑,𝑦

Allowed substitution hints:   𝐴(𝑥)   𝐶(𝑥,𝑦)

Proof of Theorem metakunt8

Step	Hyp	Ref	Expression
1		metakunt8.5	. . 3 ⊢ 𝐶 = (𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝐼, if(𝑦 < 𝐼, 𝑦, (𝑦 + 1))))
2	1	a1i 11	. 2 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → 𝐶 = (𝑦 ∈ (1...𝑀) ↦ if(𝑦 = 𝑀, 𝐼, if(𝑦 < 𝐼, 𝑦, (𝑦 + 1)))))
3		eqeq1 2739	. . . . 5 ⊢ (𝑦 = (𝐴‘𝑋) → (𝑦 = 𝑀 ↔ (𝐴‘𝑋) = 𝑀))
4		breq1 5122	. . . . . 6 ⊢ (𝑦 = (𝐴‘𝑋) → (𝑦 < 𝐼 ↔ (𝐴‘𝑋) < 𝐼))
5		id 22	. . . . . 6 ⊢ (𝑦 = (𝐴‘𝑋) → 𝑦 = (𝐴‘𝑋))
6		oveq1 7412	. . . . . 6 ⊢ (𝑦 = (𝐴‘𝑋) → (𝑦 + 1) = ((𝐴‘𝑋) + 1))
7	4, 5, 6	ifbieq12d 4529	. . . . 5 ⊢ (𝑦 = (𝐴‘𝑋) → if(𝑦 < 𝐼, 𝑦, (𝑦 + 1)) = if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1)))
8	3, 7	ifbieq2d 4527	. . . 4 ⊢ (𝑦 = (𝐴‘𝑋) → if(𝑦 = 𝑀, 𝐼, if(𝑦 < 𝐼, 𝑦, (𝑦 + 1))) = if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))))
9	8	adantl 481	. . 3 ⊢ (((𝜑 ∧ 𝐼 < 𝑋) ∧ 𝑦 = (𝐴‘𝑋)) → if(𝑦 = 𝑀, 𝐼, if(𝑦 < 𝐼, 𝑦, (𝑦 + 1))) = if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))))
10		metakunt8.1	. . . . . . . . 9 ⊢ (𝜑 → 𝑀 ∈ ℕ)
11		metakunt8.2	. . . . . . . . 9 ⊢ (𝜑 → 𝐼 ∈ ℕ)
12		metakunt8.3	. . . . . . . . 9 ⊢ (𝜑 → 𝐼 ≤ 𝑀)
13		metakunt8.4	. . . . . . . . 9 ⊢ 𝐴 = (𝑥 ∈ (1...𝑀) ↦ if(𝑥 = 𝐼, 𝑀, if(𝑥 < 𝐼, 𝑥, (𝑥 − 1))))
14		metakunt8.6	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ∈ (1...𝑀))
15	10, 11, 12, 13, 1, 14	metakunt7 42224	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → ((𝐴‘𝑋) = (𝑋 − 1) ∧ ¬ (𝐴‘𝑋) = 𝑀 ∧ ¬ (𝐴‘𝑋) < 𝐼))
16	15	simp2d 1143	. . . . . . 7 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → ¬ (𝐴‘𝑋) = 𝑀)
17		iffalse 4509	. . . . . . 7 ⊢ (¬ (𝐴‘𝑋) = 𝑀 → if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))) = if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1)))
18	16, 17	syl 17	. . . . . 6 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))) = if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1)))
19	15	simp3d 1144	. . . . . . 7 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → ¬ (𝐴‘𝑋) < 𝐼)
20		iffalse 4509	. . . . . . 7 ⊢ (¬ (𝐴‘𝑋) < 𝐼 → if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1)) = ((𝐴‘𝑋) + 1))
21	19, 20	syl 17	. . . . . 6 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1)) = ((𝐴‘𝑋) + 1))
22	18, 21	eqtrd 2770	. . . . 5 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))) = ((𝐴‘𝑋) + 1))
23	15	simp1d 1142	. . . . . . 7 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → (𝐴‘𝑋) = (𝑋 − 1))
24	23	oveq1d 7420	. . . . . 6 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → ((𝐴‘𝑋) + 1) = ((𝑋 − 1) + 1))
25		elfznn 13570	. . . . . . . . . 10 ⊢ (𝑋 ∈ (1...𝑀) → 𝑋 ∈ ℕ)
26	14, 25	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ∈ ℕ)
27	26	nncnd 12256	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ ℂ)
28		1cnd 11230	. . . . . . . 8 ⊢ (𝜑 → 1 ∈ ℂ)
29	27, 28	npcand 11598	. . . . . . 7 ⊢ (𝜑 → ((𝑋 − 1) + 1) = 𝑋)
30	29	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → ((𝑋 − 1) + 1) = 𝑋)
31	24, 30	eqtrd 2770	. . . . 5 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → ((𝐴‘𝑋) + 1) = 𝑋)
32	22, 31	eqtrd 2770	. . . 4 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))) = 𝑋)
33	32	adantr 480	. . 3 ⊢ (((𝜑 ∧ 𝐼 < 𝑋) ∧ 𝑦 = (𝐴‘𝑋)) → if((𝐴‘𝑋) = 𝑀, 𝐼, if((𝐴‘𝑋) < 𝐼, (𝐴‘𝑋), ((𝐴‘𝑋) + 1))) = 𝑋)
34	9, 33	eqtrd 2770	. 2 ⊢ (((𝜑 ∧ 𝐼 < 𝑋) ∧ 𝑦 = (𝐴‘𝑋)) → if(𝑦 = 𝑀, 𝐼, if(𝑦 < 𝐼, 𝑦, (𝑦 + 1))) = 𝑋)
35	10, 11, 12, 13	metakunt1 42218	. . . 4 ⊢ (𝜑 → 𝐴:(1...𝑀)⟶(1...𝑀))
36	35	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → 𝐴:(1...𝑀)⟶(1...𝑀))
37	14	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → 𝑋 ∈ (1...𝑀))
38	36, 37	ffvelcdmd 7075	. 2 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → (𝐴‘𝑋) ∈ (1...𝑀))
39	2, 34, 38, 37	fvmptd 6993	1 ⊢ ((𝜑 ∧ 𝐼 < 𝑋) → (𝐶‘(𝐴‘𝑋)) = 𝑋)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 395   = wceq 1540   ∈ wcel 2108  ifcif 4500   class class class wbr 5119   ↦ cmpt 5201  ⟶wf 6527  ‘cfv 6531  (class class class)co 7405  1c1 11130   + caddc 11132   < clt 11269   ≤ cle 11270   − cmin 11466  ℕcn 12240  ...cfz 13524

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-sep 5266  ax-nul 5276  ax-pow 5335  ax-pr 5402  ax-un 7729  ax-cnex 11185  ax-resscn 11186  ax-1cn 11187  ax-icn 11188  ax-addcl 11189  ax-addrcl 11190  ax-mulcl 11191  ax-mulrcl 11192  ax-mulcom 11193  ax-addass 11194  ax-mulass 11195  ax-distr 11196  ax-i2m1 11197  ax-1ne0 11198  ax-1rid 11199  ax-rnegex 11200  ax-rrecex 11201  ax-cnre 11202  ax-pre-lttri 11203  ax-pre-lttrn 11204  ax-pre-ltadd 11205  ax-pre-mulgt0 11206

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3061  df-reu 3360  df-rab 3416  df-v 3461  df-sbc 3766  df-csb 3875  df-dif 3929  df-un 3931  df-in 3933  df-ss 3943  df-pss 3946  df-nul 4309  df-if 4501  df-pw 4577  df-sn 4602  df-pr 4604  df-op 4608  df-uni 4884  df-iun 4969  df-br 5120  df-opab 5182  df-mpt 5202  df-tr 5230  df-id 5548  df-eprel 5553  df-po 5561  df-so 5562  df-fr 5606  df-we 5608  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-pred 6290  df-ord 6355  df-on 6356  df-lim 6357  df-suc 6358  df-iota 6484  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-riota 7362  df-ov 7408  df-oprab 7409  df-mpo 7410  df-om 7862  df-1st 7988  df-2nd 7989  df-frecs 8280  df-wrecs 8311  df-recs 8385  df-rdg 8424  df-er 8719  df-en 8960  df-dom 8961  df-sdom 8962  df-pnf 11271  df-mnf 11272  df-xr 11273  df-ltxr 11274  df-le 11275  df-sub 11468  df-neg 11469  df-nn 12241  df-n0 12502  df-z 12589  df-uz 12853  df-fz 13525

This theorem is referenced by:  metakunt9  42226