Theorem seqp1cd 10832

Description: Value of the sequence builder function at a successor. A version of seq3p1 10827 which provides two classes 𝐷 and 𝐶 for the terms and the value being accumulated, respectively. (Contributed by Jim Kingdon, 20-Jul-2023.)

Hypotheses

Ref	Expression
seqp1cd.m	⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀))
seqp1cd.1	⊢ (𝜑 → (𝐹‘𝑀) ∈ 𝐶)
seqp1cd.2	⊢ ((𝜑 ∧ (𝑥 ∈ 𝐶 ∧ 𝑦 ∈ 𝐷)) → (𝑥 + 𝑦) ∈ 𝐶)
seqp1cd.5	⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ≥‘(𝑀 + 1))) → (𝐹‘𝑥) ∈ 𝐷)

Assertion

Ref	Expression
seqp1cd	⊢ (𝜑 → (seq𝑀( + , 𝐹)‘(𝑁 + 1)) = ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))))

Distinct variable groups:   𝑥, + ,𝑦   𝑥,𝐶,𝑦   𝑥,𝐷,𝑦   𝑥,𝐹,𝑦   𝑥,𝑀,𝑦   𝑥,𝑁,𝑦   𝜑,𝑥,𝑦

Proof of Theorem seqp1cd

Dummy variables 𝑎 𝑏 𝑤 𝑧 𝑐 𝑑 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		seqp1cd.m	. . 3 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀))
2		eluzel2 9858	. . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑀 ∈ ℤ)
3	1, 2	syl 14	. . . 4 ⊢ (𝜑 → 𝑀 ∈ ℤ)
4		seqp1cd.1	. . . 4 ⊢ (𝜑 → (𝐹‘𝑀) ∈ 𝐶)
5		ssv 3260	. . . . 5 ⊢ 𝐶 ⊆ V
6	5	a1i 9	. . . 4 ⊢ (𝜑 → 𝐶 ⊆ V)
7		seqp1cd.5	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℤ≥‘(𝑀 + 1))) → (𝐹‘𝑥) ∈ 𝐷)
8		seqp1cd.2	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐶 ∧ 𝑦 ∈ 𝐷)) → (𝑥 + 𝑦) ∈ 𝐶)
9	7, 8	seqovcd 10829	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (ℤ≥‘𝑀) ∧ 𝑦 ∈ 𝐶)) → (𝑥(𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))𝑦) ∈ 𝐶)
10		iseqvalcbv 10821	. . . 4 ⊢ frec((𝑎 ∈ (ℤ≥‘𝑀), 𝑏 ∈ V ↦ ⟨(𝑎 + 1), (𝑎(𝑐 ∈ (ℤ≥‘𝑀), 𝑑 ∈ 𝐶 ↦ (𝑑 + (𝐹‘(𝑐 + 1))))𝑏)⟩), ⟨𝑀, (𝐹‘𝑀)⟩) = frec((𝑥 ∈ (ℤ≥‘𝑀), 𝑦 ∈ V ↦ ⟨(𝑥 + 1), (𝑥(𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))𝑦)⟩), ⟨𝑀, (𝐹‘𝑀)⟩)
11	3, 10, 4, 8, 7	seqvalcd 10823	. . . 4 ⊢ (𝜑 → seq𝑀( + , 𝐹) = ran frec((𝑎 ∈ (ℤ≥‘𝑀), 𝑏 ∈ V ↦ ⟨(𝑎 + 1), (𝑎(𝑐 ∈ (ℤ≥‘𝑀), 𝑑 ∈ 𝐶 ↦ (𝑑 + (𝐹‘(𝑐 + 1))))𝑏)⟩), ⟨𝑀, (𝐹‘𝑀)⟩))
12	3, 4, 6, 9, 10, 11	frecuzrdgsuct 10786	. . 3 ⊢ ((𝜑 ∧ 𝑁 ∈ (ℤ≥‘𝑀)) → (seq𝑀( + , 𝐹)‘(𝑁 + 1)) = (𝑁(𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))(seq𝑀( + , 𝐹)‘𝑁)))
13	1, 12	mpdan 421	. 2 ⊢ (𝜑 → (seq𝑀( + , 𝐹)‘(𝑁 + 1)) = (𝑁(𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))(seq𝑀( + , 𝐹)‘𝑁)))
14		eqid 2232	. . . . 5 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀)
15	4, 8, 14, 3, 7	seqf2 10830	. . . 4 ⊢ (𝜑 → seq𝑀( + , 𝐹):(ℤ≥‘𝑀)⟶𝐶)
16	15, 1	ffvelcdmd 5813	. . 3 ⊢ (𝜑 → (seq𝑀( + , 𝐹)‘𝑁) ∈ 𝐶)
17		fveq2 5670	. . . . . 6 ⊢ (𝑥 = (𝑁 + 1) → (𝐹‘𝑥) = (𝐹‘(𝑁 + 1)))
18	17	eleq1d 2301	. . . . 5 ⊢ (𝑥 = (𝑁 + 1) → ((𝐹‘𝑥) ∈ 𝐷 ↔ (𝐹‘(𝑁 + 1)) ∈ 𝐷))
19	7	ralrimiva 2615	. . . . 5 ⊢ (𝜑 → ∀𝑥 ∈ (ℤ≥‘(𝑀 + 1))(𝐹‘𝑥) ∈ 𝐷)
20		eluzp1p1 9880	. . . . . 6 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 + 1) ∈ (ℤ≥‘(𝑀 + 1)))
21	1, 20	syl 14	. . . . 5 ⊢ (𝜑 → (𝑁 + 1) ∈ (ℤ≥‘(𝑀 + 1)))
22	18, 19, 21	rspcdva 2926	. . . 4 ⊢ (𝜑 → (𝐹‘(𝑁 + 1)) ∈ 𝐷)
23	8, 16, 22	caovcld 6208	. . 3 ⊢ (𝜑 → ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))) ∈ 𝐶)
24		fvoveq1 6073	. . . . 5 ⊢ (𝑧 = 𝑁 → (𝐹‘(𝑧 + 1)) = (𝐹‘(𝑁 + 1)))
25	24	oveq2d 6066	. . . 4 ⊢ (𝑧 = 𝑁 → (𝑤 + (𝐹‘(𝑧 + 1))) = (𝑤 + (𝐹‘(𝑁 + 1))))
26		oveq1 6057	. . . 4 ⊢ (𝑤 = (seq𝑀( + , 𝐹)‘𝑁) → (𝑤 + (𝐹‘(𝑁 + 1))) = ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))))
27		eqid 2232	. . . 4 ⊢ (𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1)))) = (𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))
28	25, 26, 27	ovmpog 6188	. . 3 ⊢ ((𝑁 ∈ (ℤ≥‘𝑀) ∧ (seq𝑀( + , 𝐹)‘𝑁) ∈ 𝐶 ∧ ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))) ∈ 𝐶) → (𝑁(𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))(seq𝑀( + , 𝐹)‘𝑁)) = ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))))
29	1, 16, 23, 28	syl3anc 1274	. 2 ⊢ (𝜑 → (𝑁(𝑧 ∈ (ℤ≥‘𝑀), 𝑤 ∈ 𝐶 ↦ (𝑤 + (𝐹‘(𝑧 + 1))))(seq𝑀( + , 𝐹)‘𝑁)) = ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))))
30	13, 29	eqtrd 2265	1 ⊢ (𝜑 → (seq𝑀( + , 𝐹)‘(𝑁 + 1)) = ((seq𝑀( + , 𝐹)‘𝑁) + (𝐹‘(𝑁 + 1))))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1398   ∈ wcel 2203  Vcvv 2813   ⊆ wss 3211  ⟨cop 3692  ‘cfv 5352  (class class class)co 6050   ∈ cmpo 6052  freccfrec 6621  1c1 8128   + caddc 8130  ℤcz 9577  ℤ_≥cuz 9853  seqcseq 10809

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4225  ax-sep 4228  ax-nul 4236  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-iinf 4710  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-addcom 8227  ax-addass 8229  ax-distr 8231  ax-i2m1 8232  ax-0lt1 8233  ax-0id 8235  ax-rnegex 8236  ax-cnre 8238  ax-pre-ltirr 8239  ax-pre-ltwlin 8240  ax-pre-lttrn 8241  ax-pre-ltadd 8243

This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-tr 4209  df-id 4414  df-iord 4487  df-on 4489  df-ilim 4490  df-suc 4492  df-iom 4713  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-1st 6334  df-2nd 6335  df-recs 6536  df-frec 6622  df-pnf 8310  df-mnf 8311  df-xr 8312  df-ltxr 8313  df-le 8314  df-sub 8446  df-neg 8447  df-inn 9238  df-n0 9497  df-z 9578  df-uz 9854  df-seqfrec 10810

This theorem is referenced by:  ennnfonelemp1  13157