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Theorem isumsup2 15825

Description: An infinite sum of nonnegative terms is equal to the supremum of the partial sums. (Contributed by Mario Carneiro, 12-Jun-2014.)

**Hypotheses**
Ref	Expression
isumsup.1	⊢ 𝑍 = (ℤ_≥‘𝑀)
isumsup.2	⊢ 𝐺 = seq𝑀( + , 𝐹)
isumsup.3	⊢ (𝜑 → 𝑀 ∈ ℤ)
isumsup.4	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = 𝐴)
isumsup.5	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐴 ∈ ℝ)
isumsup.6	⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 0 ≤ 𝐴)
isumsup.7	⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑗 ∈ 𝑍 (𝐺‘𝑗) ≤ 𝑥)

**Assertion**
Ref	Expression
isumsup2	⊢ (𝜑 → 𝐺 ⇝ sup(ran 𝐺, ℝ, < ))

Distinct variable groups: 𝑥,𝑗,𝐴 𝑗,𝑘,𝐹,𝑥 𝑗,𝑀,𝑘,𝑥 𝜑,𝑗,𝑘 𝑗,𝑍,𝑘,𝑥 𝑗,𝐺,𝑥 Allowed substitution hints: 𝜑(𝑥) 𝐴(𝑘) 𝐺(𝑘)

**Proof of Theorem isumsup2**
Step	Hyp	Ref	Expression
1		isumsup.1	. 2 ⊢ 𝑍 = (ℤ_≥‘𝑀)
2		isumsup.3	. 2 ⊢ (𝜑 → 𝑀 ∈ ℤ)
3		isumsup.4	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = 𝐴)
4		isumsup.5	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐴 ∈ ℝ)
5	3, 4	eqeltrd 2829	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℝ)
6	1, 2, 5	serfre 14029	. . 3 ⊢ (𝜑 → seq𝑀( + , 𝐹):𝑍⟶ℝ)
7		isumsup.2	. . . 4 ⊢ 𝐺 = seq𝑀( + , 𝐹)
8	7	feq1i 6713	. . 3 ⊢ (𝐺:𝑍⟶ℝ ↔ seq𝑀( + , 𝐹):𝑍⟶ℝ)
9	6, 8	sylibr 233	. 2 ⊢ (𝜑 → 𝐺:𝑍⟶ℝ)
10		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → 𝑗 ∈ 𝑍)
11	10, 1	eleqtrdi 2839	. . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → 𝑗 ∈ (ℤ_≥‘𝑀))
12		eluzelz 12863	. . . . 5 ⊢ (𝑗 ∈ (ℤ_≥‘𝑀) → 𝑗 ∈ ℤ)
13		uzid 12868	. . . . 5 ⊢ (𝑗 ∈ ℤ → 𝑗 ∈ (ℤ_≥‘𝑗))
14		peano2uz 12916	. . . . 5 ⊢ (𝑗 ∈ (ℤ_≥‘𝑗) → (𝑗 + 1) ∈ (ℤ_≥‘𝑗))
15	11, 12, 13, 14	4syl 19	. . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (𝑗 + 1) ∈ (ℤ_≥‘𝑗))
16		simpl 482	. . . . 5 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → 𝜑)
17		elfzuz 13530	. . . . . 6 ⊢ (𝑘 ∈ (𝑀...(𝑗 + 1)) → 𝑘 ∈ (ℤ_≥‘𝑀))
18	17, 1	eleqtrrdi 2840	. . . . 5 ⊢ (𝑘 ∈ (𝑀...(𝑗 + 1)) → 𝑘 ∈ 𝑍)
19	16, 18, 5	syl2an 595	. . . 4 ⊢ (((𝜑 ∧ 𝑗 ∈ 𝑍) ∧ 𝑘 ∈ (𝑀...(𝑗 + 1))) → (𝐹‘𝑘) ∈ ℝ)
20	1	peano2uzs 12917	. . . . . . 7 ⊢ (𝑗 ∈ 𝑍 → (𝑗 + 1) ∈ 𝑍)
21	20	adantl 481	. . . . . 6 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (𝑗 + 1) ∈ 𝑍)
22		elfzuz 13530	. . . . . 6 ⊢ (𝑘 ∈ ((𝑗 + 1)...(𝑗 + 1)) → 𝑘 ∈ (ℤ_≥‘(𝑗 + 1)))
23	1	uztrn2 12872	. . . . . 6 ⊢ (((𝑗 + 1) ∈ 𝑍 ∧ 𝑘 ∈ (ℤ_≥‘(𝑗 + 1))) → 𝑘 ∈ 𝑍)
24	21, 22, 23	syl2an 595	. . . . 5 ⊢ (((𝜑 ∧ 𝑗 ∈ 𝑍) ∧ 𝑘 ∈ ((𝑗 + 1)...(𝑗 + 1))) → 𝑘 ∈ 𝑍)
25		isumsup.6	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 0 ≤ 𝐴)
26	25, 3	breqtrrd 5176	. . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 0 ≤ (𝐹‘𝑘))
27	26	adantlr 714	. . . . 5 ⊢ (((𝜑 ∧ 𝑗 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → 0 ≤ (𝐹‘𝑘))
28	24, 27	syldan 590	. . . 4 ⊢ (((𝜑 ∧ 𝑗 ∈ 𝑍) ∧ 𝑘 ∈ ((𝑗 + 1)...(𝑗 + 1))) → 0 ≤ (𝐹‘𝑘))
29	11, 15, 19, 28	sermono 14032	. . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (seq𝑀( + , 𝐹)‘𝑗) ≤ (seq𝑀( + , 𝐹)‘(𝑗 + 1)))
30	7	fveq1i 6898	. . 3 ⊢ (𝐺‘𝑗) = (seq𝑀( + , 𝐹)‘𝑗)
31	7	fveq1i 6898	. . 3 ⊢ (𝐺‘(𝑗 + 1)) = (seq𝑀( + , 𝐹)‘(𝑗 + 1))
32	29, 30, 31	3brtr4g 5182	. 2 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (𝐺‘𝑗) ≤ (𝐺‘(𝑗 + 1)))
33		isumsup.7	. 2 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑗 ∈ 𝑍 (𝐺‘𝑗) ≤ 𝑥)
34	1, 2, 9, 32, 33	climsup 15649	1 ⊢ (𝜑 → 𝐺 ⇝ sup(ran 𝐺, ℝ, < ))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1534 ∈ wcel 2099 ∀wral 3058 ∃wrex 3067 class class class wbr 5148 ran crn 5679 ⟶wf 6544 ‘cfv 6548 (class class class)co 7420 supcsup 9464 ℝcr 11138 0cc0 11139 1c1 11140 + caddc 11142 < clt 11279 ≤ cle 11280 ℤcz 12589 ℤ_≥cuz 12853 ...cfz 13517 seqcseq 13999 ⇝ cli 15461

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 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 ax-pre-sup 11217

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-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-sup 9466 df-pnf 11281 df-mnf 11282 df-xr 11283 df-ltxr 11284 df-le 11285 df-sub 11477 df-neg 11478 df-div 11903 df-nn 12244 df-2 12306 df-3 12307 df-n0 12504 df-z 12590 df-uz 12854 df-rp 13008 df-fz 13518 df-seq 14000 df-exp 14060 df-cj 15079 df-re 15080 df-im 15081 df-sqrt 15215 df-abs 15216 df-clim 15465

This theorem is referenced by: isumsup 15826 ovoliunlem1 25444 ioombl1lem4 25503 uniioombllem2 25525 uniioombllem6 25530 sge0isum 45815

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