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Mirrors > Home > ILE Home > Th. List > isumlessdc | GIF version |
Description: A finite sum of nonnegative numbers is less than or equal to its limit. (Contributed by Mario Carneiro, 24-Apr-2014.) |
Ref | Expression |
---|---|
isumless.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
isumless.2 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
isumless.3 | ⊢ (𝜑 → 𝐴 ∈ Fin) |
isumless.4 | ⊢ (𝜑 → 𝐴 ⊆ 𝑍) |
isumless.5 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = 𝐵) |
isumless.dc | ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 DECID 𝑘 ∈ 𝐴) |
isumless.6 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ ℝ) |
isumless.7 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 0 ≤ 𝐵) |
isumless.8 | ⊢ (𝜑 → seq𝑀( + , 𝐹) ∈ dom ⇝ ) |
Ref | Expression |
---|---|
isumlessdc | ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐵 ≤ Σ𝑘 ∈ 𝑍 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isumless.4 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝑍) | |
2 | isumless.dc | . . 3 ⊢ (𝜑 → ∀𝑘 ∈ 𝑍 DECID 𝑘 ∈ 𝐴) | |
3 | 1 | sselda 3102 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝑍) |
4 | isumless.6 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ ℝ) | |
5 | 4 | recnd 7818 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ∈ ℂ) |
6 | 3, 5 | syldan 280 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℂ) |
7 | 6 | ralrimiva 2508 | . . 3 ⊢ (𝜑 → ∀𝑘 ∈ 𝐴 𝐵 ∈ ℂ) |
8 | isumless.2 | . . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
9 | isumless.1 | . . . . . . 7 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
10 | 9 | eqimssi 3158 | . . . . . 6 ⊢ 𝑍 ⊆ (ℤ≥‘𝑀) |
11 | 10 | a1i 9 | . . . . 5 ⊢ (𝜑 → 𝑍 ⊆ (ℤ≥‘𝑀)) |
12 | 9 | eleq2i 2207 | . . . . . . . . . 10 ⊢ (𝑘 ∈ 𝑍 ↔ 𝑘 ∈ (ℤ≥‘𝑀)) |
13 | 12 | biimpri 132 | . . . . . . . . 9 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → 𝑘 ∈ 𝑍) |
14 | 13 | orcd 723 | . . . . . . . 8 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → (𝑘 ∈ 𝑍 ∨ ¬ 𝑘 ∈ 𝑍)) |
15 | df-dc 821 | . . . . . . . 8 ⊢ (DECID 𝑘 ∈ 𝑍 ↔ (𝑘 ∈ 𝑍 ∨ ¬ 𝑘 ∈ 𝑍)) | |
16 | 14, 15 | sylibr 133 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → DECID 𝑘 ∈ 𝑍) |
17 | 16 | rgen 2488 | . . . . . 6 ⊢ ∀𝑘 ∈ (ℤ≥‘𝑀)DECID 𝑘 ∈ 𝑍 |
18 | 17 | a1i 9 | . . . . 5 ⊢ (𝜑 → ∀𝑘 ∈ (ℤ≥‘𝑀)DECID 𝑘 ∈ 𝑍) |
19 | 8, 11, 18 | 3jca 1162 | . . . 4 ⊢ (𝜑 → (𝑀 ∈ ℤ ∧ 𝑍 ⊆ (ℤ≥‘𝑀) ∧ ∀𝑘 ∈ (ℤ≥‘𝑀)DECID 𝑘 ∈ 𝑍)) |
20 | 19 | orcd 723 | . . 3 ⊢ (𝜑 → ((𝑀 ∈ ℤ ∧ 𝑍 ⊆ (ℤ≥‘𝑀) ∧ ∀𝑘 ∈ (ℤ≥‘𝑀)DECID 𝑘 ∈ 𝑍) ∨ 𝑍 ∈ Fin)) |
21 | 1, 2, 7, 20 | isumss2 11194 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐵 = Σ𝑘 ∈ 𝑍 if(𝑘 ∈ 𝐴, 𝐵, 0)) |
22 | simpr 109 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝑘 ∈ 𝑍) | |
23 | isumless.5 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = 𝐵) | |
24 | 23, 4 | eqeltrd 2217 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℝ) |
25 | 24 | adantr 274 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ 𝑘 ∈ 𝐴) → (𝐹‘𝑘) ∈ ℝ) |
26 | 0red 7791 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑘 ∈ 𝑍) ∧ ¬ 𝑘 ∈ 𝐴) → 0 ∈ ℝ) | |
27 | 2 | r19.21bi 2523 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → DECID 𝑘 ∈ 𝐴) |
28 | 25, 26, 27 | ifcldadc 3506 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → if(𝑘 ∈ 𝐴, (𝐹‘𝑘), 0) ∈ ℝ) |
29 | eleq1w 2201 | . . . . . . 7 ⊢ (𝑗 = 𝑘 → (𝑗 ∈ 𝐴 ↔ 𝑘 ∈ 𝐴)) | |
30 | fveq2 5429 | . . . . . . 7 ⊢ (𝑗 = 𝑘 → (𝐹‘𝑗) = (𝐹‘𝑘)) | |
31 | 29, 30 | ifbieq1d 3499 | . . . . . 6 ⊢ (𝑗 = 𝑘 → if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0) = if(𝑘 ∈ 𝐴, (𝐹‘𝑘), 0)) |
32 | eqid 2140 | . . . . . 6 ⊢ (𝑗 ∈ 𝑍 ↦ if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0)) = (𝑗 ∈ 𝑍 ↦ if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0)) | |
33 | 31, 32 | fvmptg 5505 | . . . . 5 ⊢ ((𝑘 ∈ 𝑍 ∧ if(𝑘 ∈ 𝐴, (𝐹‘𝑘), 0) ∈ ℝ) → ((𝑗 ∈ 𝑍 ↦ if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0))‘𝑘) = if(𝑘 ∈ 𝐴, (𝐹‘𝑘), 0)) |
34 | 22, 28, 33 | syl2anc 409 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑗 ∈ 𝑍 ↦ if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0))‘𝑘) = if(𝑘 ∈ 𝐴, (𝐹‘𝑘), 0)) |
35 | 23 | ifeq1d 3494 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → if(𝑘 ∈ 𝐴, (𝐹‘𝑘), 0) = if(𝑘 ∈ 𝐴, 𝐵, 0)) |
36 | 34, 35 | eqtrd 2173 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((𝑗 ∈ 𝑍 ↦ if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0))‘𝑘) = if(𝑘 ∈ 𝐴, 𝐵, 0)) |
37 | 35, 28 | eqeltrrd 2218 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → if(𝑘 ∈ 𝐴, 𝐵, 0) ∈ ℝ) |
38 | 4 | leidd 8300 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 𝐵 ≤ 𝐵) |
39 | isumless.7 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → 0 ≤ 𝐵) | |
40 | breq1 3940 | . . . . 5 ⊢ (𝐵 = if(𝑘 ∈ 𝐴, 𝐵, 0) → (𝐵 ≤ 𝐵 ↔ if(𝑘 ∈ 𝐴, 𝐵, 0) ≤ 𝐵)) | |
41 | breq1 3940 | . . . . 5 ⊢ (0 = if(𝑘 ∈ 𝐴, 𝐵, 0) → (0 ≤ 𝐵 ↔ if(𝑘 ∈ 𝐴, 𝐵, 0) ≤ 𝐵)) | |
42 | 40, 41 | ifbothdc 3509 | . . . 4 ⊢ ((𝐵 ≤ 𝐵 ∧ 0 ≤ 𝐵 ∧ DECID 𝑘 ∈ 𝐴) → if(𝑘 ∈ 𝐴, 𝐵, 0) ≤ 𝐵) |
43 | 38, 39, 27, 42 | syl3anc 1217 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → if(𝑘 ∈ 𝐴, 𝐵, 0) ≤ 𝐵) |
44 | isumless.3 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
45 | 13, 27 | sylan2 284 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → DECID 𝑘 ∈ 𝐴) |
46 | 9, 8, 44, 1, 45, 36, 6 | fsum3cvg3 11197 | . . 3 ⊢ (𝜑 → seq𝑀( + , (𝑗 ∈ 𝑍 ↦ if(𝑗 ∈ 𝐴, (𝐹‘𝑗), 0))) ∈ dom ⇝ ) |
47 | isumless.8 | . . 3 ⊢ (𝜑 → seq𝑀( + , 𝐹) ∈ dom ⇝ ) | |
48 | 9, 8, 36, 37, 23, 4, 43, 46, 47 | isumle 11296 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝑍 if(𝑘 ∈ 𝐴, 𝐵, 0) ≤ Σ𝑘 ∈ 𝑍 𝐵) |
49 | 21, 48 | eqbrtrd 3958 | 1 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 𝐵 ≤ Σ𝑘 ∈ 𝑍 𝐵) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ∨ wo 698 DECID wdc 820 ∧ w3a 963 = wceq 1332 ∈ wcel 1481 ∀wral 2417 ⊆ wss 3076 ifcif 3479 class class class wbr 3937 ↦ cmpt 3997 dom cdm 4547 ‘cfv 5131 Fincfn 6642 ℂcc 7642 ℝcr 7643 0cc0 7644 + caddc 7647 ≤ cle 7825 ℤcz 9078 ℤ≥cuz 9350 seqcseq 10249 ⇝ cli 11079 Σcsu 11154 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-13 1492 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-coll 4051 ax-sep 4054 ax-nul 4062 ax-pow 4106 ax-pr 4139 ax-un 4363 ax-setind 4460 ax-iinf 4510 ax-cnex 7735 ax-resscn 7736 ax-1cn 7737 ax-1re 7738 ax-icn 7739 ax-addcl 7740 ax-addrcl 7741 ax-mulcl 7742 ax-mulrcl 7743 ax-addcom 7744 ax-mulcom 7745 ax-addass 7746 ax-mulass 7747 ax-distr 7748 ax-i2m1 7749 ax-0lt1 7750 ax-1rid 7751 ax-0id 7752 ax-rnegex 7753 ax-precex 7754 ax-cnre 7755 ax-pre-ltirr 7756 ax-pre-ltwlin 7757 ax-pre-lttrn 7758 ax-pre-apti 7759 ax-pre-ltadd 7760 ax-pre-mulgt0 7761 ax-pre-mulext 7762 ax-arch 7763 ax-caucvg 7764 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3or 964 df-3an 965 df-tru 1335 df-fal 1338 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-nel 2405 df-ral 2422 df-rex 2423 df-reu 2424 df-rmo 2425 df-rab 2426 df-v 2691 df-sbc 2914 df-csb 3008 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-nul 3369 df-if 3480 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-uni 3745 df-int 3780 df-iun 3823 df-br 3938 df-opab 3998 df-mpt 3999 df-tr 4035 df-id 4223 df-po 4226 df-iso 4227 df-iord 4296 df-on 4298 df-ilim 4299 df-suc 4301 df-iom 4513 df-xp 4553 df-rel 4554 df-cnv 4555 df-co 4556 df-dm 4557 df-rn 4558 df-res 4559 df-ima 4560 df-iota 5096 df-fun 5133 df-fn 5134 df-f 5135 df-f1 5136 df-fo 5137 df-f1o 5138 df-fv 5139 df-isom 5140 df-riota 5738 df-ov 5785 df-oprab 5786 df-mpo 5787 df-1st 6046 df-2nd 6047 df-recs 6210 df-irdg 6275 df-frec 6296 df-1o 6321 df-oadd 6325 df-er 6437 df-en 6643 df-dom 6644 df-fin 6645 df-sup 6879 df-pnf 7826 df-mnf 7827 df-xr 7828 df-ltxr 7829 df-le 7830 df-sub 7959 df-neg 7960 df-reap 8361 df-ap 8368 df-div 8457 df-inn 8745 df-2 8803 df-3 8804 df-4 8805 df-n0 9002 df-z 9079 df-uz 9351 df-q 9439 df-rp 9471 df-fz 9822 df-fzo 9951 df-seqfrec 10250 df-exp 10324 df-ihash 10554 df-cj 10646 df-re 10647 df-im 10648 df-rsqrt 10802 df-abs 10803 df-clim 11080 df-sumdc 11155 |
This theorem is referenced by: mertenslemi1 11336 |
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