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| Mirrors > Home > MPE Home > Th. List > fsump1 | Structured version Visualization version GIF version | ||
| Description: The addition of the next term in a finite sum of 𝐴(𝑘) is the current term plus 𝐵 i.e. 𝐴(𝑁 + 1). (Contributed by NM, 4-Nov-2005.) (Revised by Mario Carneiro, 21-Apr-2014.) (Proof shortened by SN, 22-Mar-2025.) |
| Ref | Expression |
|---|---|
| fsump1.1 | ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) |
| fsump1.2 | ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...(𝑁 + 1))) → 𝐴 ∈ ℂ) |
| fsump1.3 | ⊢ (𝑘 = (𝑁 + 1) → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| fsump1 | ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...(𝑁 + 1))𝐴 = (Σ𝑘 ∈ (𝑀...𝑁)𝐴 + 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fsump1.1 | . . . 4 ⊢ (𝜑 → 𝑁 ∈ (ℤ≥‘𝑀)) | |
| 2 | peano2uz 13029 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 + 1) ∈ (ℤ≥‘𝑀)) | |
| 3 | 1, 2 | syl 18 | . . 3 ⊢ (𝜑 → (𝑁 + 1) ∈ (ℤ≥‘𝑀)) |
| 4 | fsump1.2 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (𝑀...(𝑁 + 1))) → 𝐴 ∈ ℂ) | |
| 5 | fsump1.3 | . . 3 ⊢ (𝑘 = (𝑁 + 1) → 𝐴 = 𝐵) | |
| 6 | 3, 4, 5 | fsumm1 15918 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...(𝑁 + 1))𝐴 = (Σ𝑘 ∈ (𝑀...((𝑁 + 1) − 1))𝐴 + 𝐵)) |
| 7 | eluzelz 12976 | . . . . . . . 8 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
| 8 | 1, 7 | syl 18 | . . . . . . 7 ⊢ (𝜑 → 𝑁 ∈ ℤ) |
| 9 | 8 | zcnd 12805 | . . . . . 6 ⊢ (𝜑 → 𝑁 ∈ ℂ) |
| 10 | 1cnd 11303 | . . . . . 6 ⊢ (𝜑 → 1 ∈ ℂ) | |
| 11 | 9, 10 | pncand 11671 | . . . . 5 ⊢ (𝜑 → ((𝑁 + 1) − 1) = 𝑁) |
| 12 | 11 | oveq2d 7436 | . . . 4 ⊢ (𝜑 → (𝑀...((𝑁 + 1) − 1)) = (𝑀...𝑁)) |
| 13 | 12 | sumeq1d 15868 | . . 3 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...((𝑁 + 1) − 1))𝐴 = Σ𝑘 ∈ (𝑀...𝑁)𝐴) |
| 14 | 13 | oveq1d 7435 | . 2 ⊢ (𝜑 → (Σ𝑘 ∈ (𝑀...((𝑁 + 1) − 1))𝐴 + 𝐵) = (Σ𝑘 ∈ (𝑀...𝑁)𝐴 + 𝐵)) |
| 15 | 6, 14 | eqtrd 2795 | 1 ⊢ (𝜑 → Σ𝑘 ∈ (𝑀...(𝑁 + 1))𝐴 = (Σ𝑘 ∈ (𝑀...𝑁)𝐴 + 𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 ‘cfv 6538 (class class class)co 7420 ℂcc 11199 1c1 11202 + caddc 11204 − cmin 11542 ℤcz 12694 ℤ≥cuz 12966 ...cfz 13640 Σcsu 15854 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-inf2 9643 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 ax-pre-sup 11279 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-se 5604 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-isom 6547 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-er 8718 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-sup 9435 df-oi 9505 df-card 10021 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-div 11975 df-nn 12337 df-2 12406 df-3 12407 df-n0 12608 df-z 12695 df-uz 12967 df-rp 13122 df-fz 13641 df-fzo 13790 df-seq 14146 df-exp 14206 df-hash 14476 df-cj 15267 df-re 15268 df-im 15269 df-sqrt 15403 df-abs 15404 df-clim 15656 df-sum 15855 |
| This theorem is used by: fsump1i 15936 bcxmas 16005 binomfallfaclem2 16207 bpoly2 16224 bpoly3 16225 bpoly4 16226 fprodefsum 16262 plyco 26561 vieta1lem2 26635 emcllem2 27325 subfacval2 36021 bccolsum 36579 fwddifnp1 37005 sticksstones10 43281 stoweidlem20 47106 dirkertrigeqlem1 47184 dirkertrigeqlem3 47186 carageniuncllem1 47607 altgsumbcALT 49541 |
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