| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fsumlessf | Structured version Visualization version GIF version | ||
| Description: A shorter sum of nonnegative terms is smaller than a longer one. (Contributed by Glauco Siliprandi, 21-Nov-2020.) |
| Ref | Expression |
|---|---|
| fsumlessf.k | ⊢ Ⅎ𝑘𝜑 |
| fsumge0.a | ⊢ (𝜑 → 𝐴 ∈ Fin) |
| fsumge0.b | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℝ) |
| fsumge0.l | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 0 ≤ 𝐵) |
| fsumless.c | ⊢ (𝜑 → 𝐶 ⊆ 𝐴) |
| Ref | Expression |
|---|---|
| fsumlessf | ⊢ (𝜑 → Σ𝑘 ∈ 𝐶 𝐵 ≤ Σ𝑘 ∈ 𝐴 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fsumge0.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
| 2 | fsumlessf.k | . . . . . 6 ⊢ Ⅎ𝑘𝜑 | |
| 3 | nfv 1915 | . . . . . 6 ⊢ Ⅎ𝑘 𝑗 ∈ 𝐴 | |
| 4 | 2, 3 | nfan 1900 | . . . . 5 ⊢ Ⅎ𝑘(𝜑 ∧ 𝑗 ∈ 𝐴) |
| 5 | nfcsb1v 3871 | . . . . . 6 ⊢ Ⅎ𝑘⦋𝑗 / 𝑘⦌𝐵 | |
| 6 | 5 | nfel1 2913 | . . . . 5 ⊢ Ⅎ𝑘⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ |
| 7 | 4, 6 | nfim 1897 | . . . 4 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑗 ∈ 𝐴) → ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ) |
| 8 | eleq1w 2817 | . . . . . 6 ⊢ (𝑘 = 𝑗 → (𝑘 ∈ 𝐴 ↔ 𝑗 ∈ 𝐴)) | |
| 9 | 8 | anbi2d 630 | . . . . 5 ⊢ (𝑘 = 𝑗 → ((𝜑 ∧ 𝑘 ∈ 𝐴) ↔ (𝜑 ∧ 𝑗 ∈ 𝐴))) |
| 10 | csbeq1a 3861 | . . . . . 6 ⊢ (𝑘 = 𝑗 → 𝐵 = ⦋𝑗 / 𝑘⦌𝐵) | |
| 11 | 10 | eleq1d 2819 | . . . . 5 ⊢ (𝑘 = 𝑗 → (𝐵 ∈ ℝ ↔ ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ)) |
| 12 | 9, 11 | imbi12d 344 | . . . 4 ⊢ (𝑘 = 𝑗 → (((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℝ) ↔ ((𝜑 ∧ 𝑗 ∈ 𝐴) → ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ))) |
| 13 | fsumge0.b | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ ℝ) | |
| 14 | 7, 12, 13 | chvarfv 2245 | . . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐴) → ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ) |
| 15 | nfcv 2896 | . . . . . 6 ⊢ Ⅎ𝑘0 | |
| 16 | nfcv 2896 | . . . . . 6 ⊢ Ⅎ𝑘 ≤ | |
| 17 | 15, 16, 5 | nfbr 5143 | . . . . 5 ⊢ Ⅎ𝑘0 ≤ ⦋𝑗 / 𝑘⦌𝐵 |
| 18 | 4, 17 | nfim 1897 | . . . 4 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑗 ∈ 𝐴) → 0 ≤ ⦋𝑗 / 𝑘⦌𝐵) |
| 19 | 10 | breq2d 5108 | . . . . 5 ⊢ (𝑘 = 𝑗 → (0 ≤ 𝐵 ↔ 0 ≤ ⦋𝑗 / 𝑘⦌𝐵)) |
| 20 | 9, 19 | imbi12d 344 | . . . 4 ⊢ (𝑘 = 𝑗 → (((𝜑 ∧ 𝑘 ∈ 𝐴) → 0 ≤ 𝐵) ↔ ((𝜑 ∧ 𝑗 ∈ 𝐴) → 0 ≤ ⦋𝑗 / 𝑘⦌𝐵))) |
| 21 | fsumge0.l | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 0 ≤ 𝐵) | |
| 22 | 18, 20, 21 | chvarfv 2245 | . . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐴) → 0 ≤ ⦋𝑗 / 𝑘⦌𝐵) |
| 23 | fsumless.c | . . 3 ⊢ (𝜑 → 𝐶 ⊆ 𝐴) | |
| 24 | 1, 14, 22, 23 | fsumless 15717 | . 2 ⊢ (𝜑 → Σ𝑗 ∈ 𝐶 ⦋𝑗 / 𝑘⦌𝐵 ≤ Σ𝑗 ∈ 𝐴 ⦋𝑗 / 𝑘⦌𝐵) |
| 25 | nfcv 2896 | . . . 4 ⊢ Ⅎ𝑗𝐵 | |
| 26 | 10, 25, 5 | cbvsum 15616 | . . 3 ⊢ Σ𝑘 ∈ 𝐶 𝐵 = Σ𝑗 ∈ 𝐶 ⦋𝑗 / 𝑘⦌𝐵 |
| 27 | 10, 25, 5 | cbvsum 15616 | . . 3 ⊢ Σ𝑘 ∈ 𝐴 𝐵 = Σ𝑗 ∈ 𝐴 ⦋𝑗 / 𝑘⦌𝐵 |
| 28 | 26, 27 | breq12i 5105 | . 2 ⊢ (Σ𝑘 ∈ 𝐶 𝐵 ≤ Σ𝑘 ∈ 𝐴 𝐵 ↔ Σ𝑗 ∈ 𝐶 ⦋𝑗 / 𝑘⦌𝐵 ≤ Σ𝑗 ∈ 𝐴 ⦋𝑗 / 𝑘⦌𝐵) |
| 29 | 24, 28 | sylibr 234 | 1 ⊢ (𝜑 → Σ𝑘 ∈ 𝐶 𝐵 ≤ Σ𝑘 ∈ 𝐴 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 Ⅎwnf 1784 ∈ wcel 2113 ⦋csb 3847 ⊆ wss 3899 class class class wbr 5096 Fincfn 8881 ℝcr 11023 0cc0 11024 ≤ cle 11165 Σcsu 15607 |
| 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 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-inf2 9548 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 |
| 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 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-se 5576 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-isom 6499 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-sup 9343 df-oi 9413 df-card 9849 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-3 12207 df-n0 12400 df-z 12487 df-uz 12750 df-rp 12904 df-ico 13265 df-fz 13422 df-fzo 13569 df-seq 13923 df-exp 13983 df-hash 14252 df-cj 15020 df-re 15021 df-im 15022 df-sqrt 15156 df-abs 15157 df-clim 15409 df-sum 15608 |
| This theorem is referenced by: sge0uzfsumgt 46630 sge0reuz 46633 |
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