Theorem sge0reuzb 46545

Description: Value of the generalized sum of uniformly bounded nonnegative reals, when the domain is a set of upper integers. (Contributed by Glauco Siliprandi, 8-Apr-2021.)

Hypotheses

Ref	Expression
sge0reuzb.k	⊢ Ⅎ𝑘𝜑
sge0reuzb.p	⊢ Ⅎ𝑥𝜑
sge0reuzb.m	⊢ (𝜑 → 𝑀 ∈ ℤ)
sge0reuzb.z	⊢ 𝑍 = (ℤ≥‘𝑀)
sge0reuzb.b	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ (0[,)+∞))
sge0reuzb.x	⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥)

Assertion

Ref	Expression
sge0reuzb	⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝑍 ↦ 𝐵)) = sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ, < ))

Distinct variable groups:   𝐵,𝑛,𝑥   𝑘,𝑀,𝑛,𝑥   𝑘,𝑍,𝑛,𝑥   𝜑,𝑛

Allowed substitution hints:   𝜑(𝑥,𝑘)   𝐵(𝑘)

Proof of Theorem sge0reuzb

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		sge0reuzb.k	. . 3 ⊢ Ⅎ𝑘𝜑
2		sge0reuzb.m	. . 3 ⊢ (𝜑 → 𝑀 ∈ ℤ)
3		sge0reuzb.z	. . 3 ⊢ 𝑍 = (ℤ≥‘𝑀)
4		sge0reuzb.b	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ (0[,)+∞))
5	1, 2, 3, 4	sge0reuz 46544	. 2 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝑍 ↦ 𝐵)) = sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ*, < ))
6		nfv 1915	. . . 4 ⊢ Ⅎ𝑛𝜑
7		eqid 2731	. . . 4 ⊢ (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) = (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)
8		nfv 1915	. . . . . 6 ⊢ Ⅎ𝑘 𝑛 ∈ 𝑍
9	1, 8	nfan 1900	. . . . 5 ⊢ Ⅎ𝑘(𝜑 ∧ 𝑛 ∈ 𝑍)
10		fzfid 13880	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑀...𝑛) ∈ Fin)
11		elfzuz 13420	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝑀...𝑛) → 𝑘 ∈ (ℤ≥‘𝑀))
12	11, 3	eleqtrrdi 2842	. . . . . . . 8 ⊢ (𝑘 ∈ (𝑀...𝑛) → 𝑘 ∈ 𝑍)
13	12	adantl 481	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑛)) → 𝑘 ∈ 𝑍)
14		rge0ssre 13356	. . . . . . . 8 ⊢ (0[,)+∞) ⊆ ℝ
15	14, 4	sselid 3927	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ ℝ)
16	13, 15	syldan 591	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...𝑛)) → 𝐵 ∈ ℝ)
17	16	adantlr 715	. . . . 5 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ 𝑘 ∈ (𝑀...𝑛)) → 𝐵 ∈ ℝ)
18	9, 10, 17	fsumreclf 45675	. . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → Σ𝑘 ∈ (𝑀...𝑛)𝐵 ∈ ℝ)
19	6, 7, 18	rnmptssd 45292	. . 3 ⊢ (𝜑 → ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) ⊆ ℝ)
20		uzid 12747	. . . . . . . 8 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (ℤ≥‘𝑀))
21	2, 20	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑀 ∈ (ℤ≥‘𝑀))
22	21, 3	eleqtrrdi 2842	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ 𝑍)
23		eqidd 2732	. . . . . 6 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)𝐵 = Σ𝑘 ∈ (𝑀...𝑀)𝐵)
24		oveq2 7354	. . . . . . . 8 ⊢ (𝑛 = 𝑀 → (𝑀...𝑛) = (𝑀...𝑀))
25	24	sumeq1d 15607	. . . . . . 7 ⊢ (𝑛 = 𝑀 → Σ𝑘 ∈ (𝑀...𝑛)𝐵 = Σ𝑘 ∈ (𝑀...𝑀)𝐵)
26	25	rspceeqv 3595	. . . . . 6 ⊢ ((𝑀 ∈ 𝑍 ∧ Σ𝑘 ∈ (𝑀...𝑀)𝐵 = Σ𝑘 ∈ (𝑀...𝑀)𝐵) → ∃𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑀)𝐵 = Σ𝑘 ∈ (𝑀...𝑛)𝐵)
27	22, 23, 26	syl2anc 584	. . . . 5 ⊢ (𝜑 → ∃𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑀)𝐵 = Σ𝑘 ∈ (𝑀...𝑛)𝐵)
28		sumex 15595	. . . . . 6 ⊢ Σ𝑘 ∈ (𝑀...𝑀)𝐵 ∈ V
29	28	a1i 11	. . . . 5 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)𝐵 ∈ V)
30	7, 27, 29	elrnmptd 5902	. . . 4 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...𝑀)𝐵 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵))
31	30	ne0d 4289	. . 3 ⊢ (𝜑 → ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) ≠ ∅)
32		sge0reuzb.x	. . . 4 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥)
33		sge0reuzb.p	. . . . 5 ⊢ Ⅎ𝑥𝜑
34		vex 3440	. . . . . . . . . . . 12 ⊢ 𝑦 ∈ V
35	7	elrnmpt 5897	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ V → (𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) ↔ ∃𝑛 ∈ 𝑍 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵))
36	34, 35	ax-mp 5	. . . . . . . . . . 11 ⊢ (𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) ↔ ∃𝑛 ∈ 𝑍 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵)
37	36	biimpi 216	. . . . . . . . . 10 ⊢ (𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) → ∃𝑛 ∈ 𝑍 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵)
38	37	adantl 481	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)) → ∃𝑛 ∈ 𝑍 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵)
39		nfv 1915	. . . . . . . . . . . 12 ⊢ Ⅎ𝑛(𝜑 ∧ 𝑥 ∈ ℝ)
40		nfra1 3256	. . . . . . . . . . . 12 ⊢ Ⅎ𝑛∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥
41	39, 40	nfan 1900	. . . . . . . . . . 11 ⊢ Ⅎ𝑛((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥)
42		nfv 1915	. . . . . . . . . . 11 ⊢ Ⅎ𝑛 𝑦 ≤ 𝑥
43		rspa 3221	. . . . . . . . . . . . . 14 ⊢ ((∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 ∧ 𝑛 ∈ 𝑍) → Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥)
44		simpr 484	. . . . . . . . . . . . . . . 16 ⊢ ((Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 ∧ 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵) → 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵)
45		simpl 482	. . . . . . . . . . . . . . . 16 ⊢ ((Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 ∧ 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵) → Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥)
46	44, 45	eqbrtrd 5111	. . . . . . . . . . . . . . 15 ⊢ ((Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 ∧ 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵) → 𝑦 ≤ 𝑥)
47	46	ex 412	. . . . . . . . . . . . . 14 ⊢ (Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 → (𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵 → 𝑦 ≤ 𝑥))
48	43, 47	syl 17	. . . . . . . . . . . . 13 ⊢ ((∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 ∧ 𝑛 ∈ 𝑍) → (𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵 → 𝑦 ≤ 𝑥))
49	48	ex 412	. . . . . . . . . . . 12 ⊢ (∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 → (𝑛 ∈ 𝑍 → (𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵 → 𝑦 ≤ 𝑥)))
50	49	adantl 481	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥) → (𝑛 ∈ 𝑍 → (𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵 → 𝑦 ≤ 𝑥)))
51	41, 42, 50	rexlimd 3239	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥) → (∃𝑛 ∈ 𝑍 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵 → 𝑦 ≤ 𝑥))
52	51	adantr 480	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)) → (∃𝑛 ∈ 𝑍 𝑦 = Σ𝑘 ∈ (𝑀...𝑛)𝐵 → 𝑦 ≤ 𝑥))
53	38, 52	mpd 15	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥) ∧ 𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)) → 𝑦 ≤ 𝑥)
54	53	ralrimiva 3124	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥) → ∀𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)𝑦 ≤ 𝑥)
55	54	ex 412	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 → ∀𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)𝑦 ≤ 𝑥))
56	55	ex 412	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ ℝ → (∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 → ∀𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)𝑦 ≤ 𝑥)))
57	33, 56	reximdai 3234	. . . 4 ⊢ (𝜑 → (∃𝑥 ∈ ℝ ∀𝑛 ∈ 𝑍 Σ𝑘 ∈ (𝑀...𝑛)𝐵 ≤ 𝑥 → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)𝑦 ≤ 𝑥))
58	32, 57	mpd 15	. . 3 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)𝑦 ≤ 𝑥)
59		supxrre 13226	. . 3 ⊢ ((ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) ⊆ ℝ ∧ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵)𝑦 ≤ 𝑥) → sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ*, < ) = sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ, < ))
60	19, 31, 58, 59	syl3anc 1373	. 2 ⊢ (𝜑 → sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ*, < ) = sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ, < ))
61	5, 60	eqtrd 2766	1 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝑍 ↦ 𝐵)) = sup(ran (𝑛 ∈ 𝑍 ↦ Σ𝑘 ∈ (𝑀...𝑛)𝐵), ℝ, < ))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1541  Ⅎwnf 1784   ∈ wcel 2111   ≠ wne 2928  ∀wral 3047  ∃wrex 3056  Vcvv 3436   ⊆ wss 3897  ∅c0 4280   class class class wbr 5089   ↦ cmpt 5170  ran crn 5615  ‘cfv 6481  (class class class)co 7346  supcsup 9324  ℝcr 11005  0cc0 11006  +∞cpnf 11143  ℝ^*cxr 11145   < clt 11146   ≤ cle 11147  ℤcz 12468  ℤ_≥cuz 12732  [,)cico 13247  ...cfz 13407  Σcsu 15593  Σ^{^}csumge0 46459

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-rep 5215  ax-sep 5232  ax-nul 5242  ax-pow 5301  ax-pr 5368  ax-un 7668  ax-inf2 9531  ax-cnex 11062  ax-resscn 11063  ax-1cn 11064  ax-icn 11065  ax-addcl 11066  ax-addrcl 11067  ax-mulcl 11068  ax-mulrcl 11069  ax-mulcom 11070  ax-addass 11071  ax-mulass 11072  ax-distr 11073  ax-i2m1 11074  ax-1ne0 11075  ax-1rid 11076  ax-rnegex 11077  ax-rrecex 11078  ax-cnre 11079  ax-pre-lttri 11080  ax-pre-lttrn 11081  ax-pre-ltadd 11082  ax-pre-mulgt0 11083  ax-pre-sup 11084

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-nel 3033  df-ral 3048  df-rex 3057  df-rmo 3346  df-reu 3347  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-pss 3917  df-nul 4281  df-if 4473  df-pw 4549  df-sn 4574  df-pr 4576  df-op 4580  df-uni 4857  df-int 4896  df-iun 4941  df-br 5090  df-opab 5152  df-mpt 5171  df-tr 5197  df-id 5509  df-eprel 5514  df-po 5522  df-so 5523  df-fr 5567  df-se 5568  df-we 5569  df-xp 5620  df-rel 5621  df-cnv 5622  df-co 5623  df-dm 5624  df-rn 5625  df-res 5626  df-ima 5627  df-pred 6248  df-ord 6309  df-on 6310  df-lim 6311  df-suc 6312  df-iota 6437  df-fun 6483  df-fn 6484  df-f 6485  df-f1 6486  df-fo 6487  df-f1o 6488  df-fv 6489  df-isom 6490  df-riota 7303  df-ov 7349  df-oprab 7350  df-mpo 7351  df-om 7797  df-1st 7921  df-2nd 7922  df-frecs 8211  df-wrecs 8242  df-recs 8291  df-rdg 8329  df-1o 8385  df-er 8622  df-en 8870  df-dom 8871  df-sdom 8872  df-fin 8873  df-sup 9326  df-oi 9396  df-card 9832  df-pnf 11148  df-mnf 11149  df-xr 11150  df-ltxr 11151  df-le 11152  df-sub 11346  df-neg 11347  df-div 11775  df-nn 12126  df-2 12188  df-3 12189  df-n0 12382  df-z 12469  df-uz 12733  df-rp 12891  df-ico 13251  df-icc 13252  df-fz 13408  df-fzo 13555  df-seq 13909  df-exp 13969  df-hash 14238  df-cj 15006  df-re 15007  df-im 15008  df-sqrt 15142  df-abs 15143  df-clim 15395  df-sum 15594  df-sumge0 46460

This theorem is referenced by:  meaiuninclem  46577