| 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 1941 | . . . . . 6 ⊢ Ⅎ𝑘 𝑗 ∈ 𝐴 | |
| 4 | 2, 3 | nfan 1926 | . . . . 5 ⊢ Ⅎ𝑘(𝜑 ∧ 𝑗 ∈ 𝐴) |
| 5 | nfcsb1v 3885 | . . . . . 6 ⊢ Ⅎ𝑘⦋𝑗 / 𝑘⦌𝐵 | |
| 6 | 5 | nfel1 2947 | . . . . 5 ⊢ Ⅎ𝑘⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ |
| 7 | 4, 6 | nfim 1923 | . . . 4 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑗 ∈ 𝐴) → ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ) |
| 8 | eleq1w 2852 | . . . . . 6 ⊢ (𝑘 = 𝑗 → (𝑘 ∈ 𝐴 ↔ 𝑗 ∈ 𝐴)) | |
| 9 | 8 | anbi2d 641 | . . . . 5 ⊢ (𝑘 = 𝑗 → ((𝜑 ∧ 𝑘 ∈ 𝐴) ↔ (𝜑 ∧ 𝑗 ∈ 𝐴))) |
| 10 | csbeq1a 3875 | . . . . . 6 ⊢ (𝑘 = 𝑗 → 𝐵 = ⦋𝑗 / 𝑘⦌𝐵) | |
| 11 | 10 | eleq1d 2854 | . . . . 5 ⊢ (𝑘 = 𝑗 → (𝐵 ∈ ℝ ↔ ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ)) |
| 12 | 9, 11 | imbi12d 347 | . . . 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 2282 | . . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐴) → ⦋𝑗 / 𝑘⦌𝐵 ∈ ℝ) |
| 15 | nfcv 2931 | . . . . . 6 ⊢ Ⅎ𝑘0 | |
| 16 | nfcv 2931 | . . . . . 6 ⊢ Ⅎ𝑘 ≤ | |
| 17 | 15, 16, 5 | nfbr 5162 | . . . . 5 ⊢ Ⅎ𝑘0 ≤ ⦋𝑗 / 𝑘⦌𝐵 |
| 18 | 4, 17 | nfim 1923 | . . . 4 ⊢ Ⅎ𝑘((𝜑 ∧ 𝑗 ∈ 𝐴) → 0 ≤ ⦋𝑗 / 𝑘⦌𝐵) |
| 19 | 10 | breq2d 5125 | . . . . 5 ⊢ (𝑘 = 𝑗 → (0 ≤ 𝐵 ↔ 0 ≤ ⦋𝑗 / 𝑘⦌𝐵)) |
| 20 | 9, 19 | imbi12d 347 | . . . 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 2282 | . . 3 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐴) → 0 ≤ ⦋𝑗 / 𝑘⦌𝐵) |
| 23 | fsumless.c | . . 3 ⊢ (𝜑 → 𝐶 ⊆ 𝐴) | |
| 24 | 1, 14, 22, 23 | fsumless 15847 | . 2 ⊢ (𝜑 → Σ𝑗 ∈ 𝐶 ⦋𝑗 / 𝑘⦌𝐵 ≤ Σ𝑗 ∈ 𝐴 ⦋𝑗 / 𝑘⦌𝐵) |
| 25 | nfcv 2931 | . . . 4 ⊢ Ⅎ𝑗𝐵 | |
| 26 | 10, 25, 5 | cbvsum 15745 | . . 3 ⊢ Σ𝑘 ∈ 𝐶 𝐵 = Σ𝑗 ∈ 𝐶 ⦋𝑗 / 𝑘⦌𝐵 |
| 27 | 10, 25, 5 | cbvsum 15745 | . . 3 ⊢ Σ𝑘 ∈ 𝐴 𝐵 = Σ𝑗 ∈ 𝐴 ⦋𝑗 / 𝑘⦌𝐵 |
| 28 | 26, 27 | breq12i 5122 | . 2 ⊢ (Σ𝑘 ∈ 𝐶 𝐵 ≤ Σ𝑘 ∈ 𝐴 𝐵 ↔ Σ𝑗 ∈ 𝐶 ⦋𝑗 / 𝑘⦌𝐵 ≤ Σ𝑗 ∈ 𝐴 ⦋𝑗 / 𝑘⦌𝐵) |
| 29 | 24, 28 | sylibr 237 | 1 ⊢ (𝜑 → Σ𝑘 ∈ 𝐶 𝐵 ≤ Σ𝑘 ∈ 𝐴 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1567 Ⅎwnf 1810 ∈ wcel 2149 ⦋csb 3861 ⊆ wss 3913 class class class wbr 5113 Fincfn 8942 ℝcr 11098 0cc0 11099 ≤ cle 11243 Σcsu 15736 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-inf2 9609 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 ax-pre-sup 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-se 5616 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-sup 9401 df-oi 9471 df-card 9924 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-div 11871 df-nn 12233 df-2 12302 df-3 12303 df-n0 12504 df-z 12591 df-uz 12862 df-rp 13016 df-ico 13377 df-fz 13535 df-fzo 13682 df-seq 14037 df-exp 14097 df-hash 14366 df-cj 15149 df-re 15150 df-im 15151 df-sqrt 15285 df-abs 15286 df-clim 15538 df-sum 15737 |
| This theorem is referenced by: sge0uzfsumgt 47049 sge0reuz 47052 |
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