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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fsummmodsndifre | Structured version Visualization version GIF version | ||
| Description: A finite sum of summands modulo a positive number with one of its summands removed is a real number. (Contributed by Alexander van der Vekens, 31-Aug-2018.) |
| Ref | Expression |
|---|---|
| fsummmodsndifre | ⊢ ((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → Σ𝑘 ∈ (𝐴 ∖ {𝑋})(𝐵 mod 𝑁) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | csbeq1a 3852 | . . 3 ⊢ (𝑘 = 𝑥 → (𝐵 mod 𝑁) = ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁)) | |
| 2 | nfcv 2899 | . . 3 ⊢ Ⅎ𝑥(𝐵 mod 𝑁) | |
| 3 | nfcsb1v 3862 | . . 3 ⊢ Ⅎ𝑘⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) | |
| 4 | 1, 2, 3 | cbvsum 15619 | . 2 ⊢ Σ𝑘 ∈ (𝐴 ∖ {𝑋})(𝐵 mod 𝑁) = Σ𝑥 ∈ (𝐴 ∖ {𝑋})⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) |
| 5 | diffi 9100 | . . . 4 ⊢ (𝐴 ∈ Fin → (𝐴 ∖ {𝑋}) ∈ Fin) | |
| 6 | 5 | 3ad2ant1 1134 | . . 3 ⊢ ((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → (𝐴 ∖ {𝑋}) ∈ Fin) |
| 7 | eldifi 4072 | . . . . . . . 8 ⊢ (𝑥 ∈ (𝐴 ∖ {𝑋}) → 𝑥 ∈ 𝐴) | |
| 8 | rspcsbela 4379 | . . . . . . . 8 ⊢ ((𝑥 ∈ 𝐴 ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) | |
| 9 | 7, 8 | sylan 581 | . . . . . . 7 ⊢ ((𝑥 ∈ (𝐴 ∖ {𝑋}) ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) |
| 10 | 9 | expcom 413 | . . . . . 6 ⊢ (∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ → (𝑥 ∈ (𝐴 ∖ {𝑋}) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ)) |
| 11 | 10 | 3ad2ant3 1136 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → (𝑥 ∈ (𝐴 ∖ {𝑋}) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ)) |
| 12 | 11 | imp 406 | . . . 4 ⊢ (((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) ∧ 𝑥 ∈ (𝐴 ∖ {𝑋})) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) |
| 13 | vex 3434 | . . . . . . . . 9 ⊢ 𝑥 ∈ V | |
| 14 | csbov1g 7405 | . . . . . . . . 9 ⊢ (𝑥 ∈ V → ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) = (⦋𝑥 / 𝑘⦌𝐵 mod 𝑁)) | |
| 15 | 13, 14 | ax-mp 5 | . . . . . . . 8 ⊢ ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) = (⦋𝑥 / 𝑘⦌𝐵 mod 𝑁) |
| 16 | zre 12493 | . . . . . . . . . 10 ⊢ (⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℝ) | |
| 17 | 16 | adantl 481 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) → ⦋𝑥 / 𝑘⦌𝐵 ∈ ℝ) |
| 18 | nnrp 12918 | . . . . . . . . . 10 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℝ+) | |
| 19 | 18 | adantr 480 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) → 𝑁 ∈ ℝ+) |
| 20 | 17, 19 | modcld 13796 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) → (⦋𝑥 / 𝑘⦌𝐵 mod 𝑁) ∈ ℝ) |
| 21 | 15, 20 | eqeltrid 2841 | . . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ ⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ) → ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) ∈ ℝ) |
| 22 | 21 | ex 412 | . . . . . 6 ⊢ (𝑁 ∈ ℕ → (⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ → ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) ∈ ℝ)) |
| 23 | 22 | 3ad2ant2 1135 | . . . . 5 ⊢ ((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → (⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ → ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) ∈ ℝ)) |
| 24 | 23 | adantr 480 | . . . 4 ⊢ (((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) ∧ 𝑥 ∈ (𝐴 ∖ {𝑋})) → (⦋𝑥 / 𝑘⦌𝐵 ∈ ℤ → ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) ∈ ℝ)) |
| 25 | 12, 24 | mpd 15 | . . 3 ⊢ (((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) ∧ 𝑥 ∈ (𝐴 ∖ {𝑋})) → ⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) ∈ ℝ) |
| 26 | 6, 25 | fsumrecl 15658 | . 2 ⊢ ((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → Σ𝑥 ∈ (𝐴 ∖ {𝑋})⦋𝑥 / 𝑘⦌(𝐵 mod 𝑁) ∈ ℝ) |
| 27 | 4, 26 | eqeltrid 2841 | 1 ⊢ ((𝐴 ∈ Fin ∧ 𝑁 ∈ ℕ ∧ ∀𝑘 ∈ 𝐴 𝐵 ∈ ℤ) → Σ𝑘 ∈ (𝐴 ∖ {𝑋})(𝐵 mod 𝑁) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ∀wral 3052 Vcvv 3430 ⦋csb 3838 ∖ cdif 3887 {csn 4568 (class class class)co 7358 Fincfn 8884 ℝcr 11026 ℕcn 12146 ℤcz 12489 ℝ+crp 12906 mod cmo 13790 Σcsu 15610 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 ax-inf2 9551 ax-cnex 11083 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 ax-pre-sup 11105 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 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 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-sup 9346 df-inf 9347 df-oi 9416 df-card 9852 df-pnf 11169 df-mnf 11170 df-xr 11171 df-ltxr 11172 df-le 11173 df-sub 11367 df-neg 11368 df-div 11796 df-nn 12147 df-2 12209 df-3 12210 df-n0 12403 df-z 12490 df-uz 12753 df-rp 12907 df-fz 13425 df-fzo 13572 df-fl 13713 df-mod 13791 df-seq 13926 df-exp 13986 df-hash 14255 df-cj 15023 df-re 15024 df-im 15025 df-sqrt 15159 df-abs 15160 df-clim 15412 df-sum 15611 |
| This theorem is referenced by: (None) |
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