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| Mirrors > Home > ILE Home > Th. List > gsumfzsnfd | GIF version | ||
| Description: Group sum of a singleton, deduction form, using bound-variable hypotheses instead of distinct variable conditions. (Contributed by Mario Carneiro, 19-Dec-2014.) (Revised by Thierry Arnoux, 28-Mar-2018.) (Revised by AV, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| gsumsnd.b | ⊢ 𝐵 = (Base‘𝐺) |
| gsumsnd.g | ⊢ (𝜑 → 𝐺 ∈ Mnd) |
| gsumfzsnd.m | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
| gsumsnd.c | ⊢ (𝜑 → 𝐶 ∈ 𝐵) |
| gsumsnd.s | ⊢ ((𝜑 ∧ 𝑘 = 𝑀) → 𝐴 = 𝐶) |
| gsumsnfd.p | ⊢ Ⅎ𝑘𝜑 |
| gsumsnfd.c | ⊢ Ⅎ𝑘𝐶 |
| Ref | Expression |
|---|---|
| gsumfzsnfd | ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝐴)) = 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | gsumsnfd.p | . . . . 5 ⊢ Ⅎ𝑘𝜑 | |
| 2 | elsni 3706 | . . . . . 6 ⊢ (𝑘 ∈ {𝑀} → 𝑘 = 𝑀) | |
| 3 | gsumsnd.s | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 = 𝑀) → 𝐴 = 𝐶) | |
| 4 | 2, 3 | sylan2 286 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ {𝑀}) → 𝐴 = 𝐶) |
| 5 | 1, 4 | mpteq2da 4198 | . . . 4 ⊢ (𝜑 → (𝑘 ∈ {𝑀} ↦ 𝐴) = (𝑘 ∈ {𝑀} ↦ 𝐶)) |
| 6 | 5 | oveq2d 6065 | . . 3 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝐴)) = (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝐶))) |
| 7 | gsumfzsnd.m | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
| 8 | fzsn 10396 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → (𝑀...𝑀) = {𝑀}) | |
| 9 | 7, 8 | syl 14 | . . . . 5 ⊢ (𝜑 → (𝑀...𝑀) = {𝑀}) |
| 10 | 9 | mpteq1d 4194 | . . . 4 ⊢ (𝜑 → (𝑘 ∈ (𝑀...𝑀) ↦ 𝐶) = (𝑘 ∈ {𝑀} ↦ 𝐶)) |
| 11 | 10 | oveq2d 6065 | . . 3 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ (𝑀...𝑀) ↦ 𝐶)) = (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝐶))) |
| 12 | gsumsnd.g | . . . 4 ⊢ (𝜑 → 𝐺 ∈ Mnd) | |
| 13 | 7 | uzidd 9865 | . . . 4 ⊢ (𝜑 → 𝑀 ∈ (ℤ≥‘𝑀)) |
| 14 | gsumsnd.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝐵) | |
| 15 | gsumsnfd.c | . . . . 5 ⊢ Ⅎ𝑘𝐶 | |
| 16 | gsumsnd.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
| 17 | eqid 2232 | . . . . 5 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
| 18 | 15, 16, 17 | gsumfzconstf 14048 | . . . 4 ⊢ ((𝐺 ∈ Mnd ∧ 𝑀 ∈ (ℤ≥‘𝑀) ∧ 𝐶 ∈ 𝐵) → (𝐺 Σg (𝑘 ∈ (𝑀...𝑀) ↦ 𝐶)) = (((𝑀 − 𝑀) + 1)(.g‘𝐺)𝐶)) |
| 19 | 12, 13, 14, 18 | syl3anc 1274 | . . 3 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ (𝑀...𝑀) ↦ 𝐶)) = (((𝑀 − 𝑀) + 1)(.g‘𝐺)𝐶)) |
| 20 | 6, 11, 19 | 3eqtr2d 2271 | . 2 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝐴)) = (((𝑀 − 𝑀) + 1)(.g‘𝐺)𝐶)) |
| 21 | 7 | zcnd 9697 | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ ℂ) |
| 22 | 21 | subidd 8568 | . . . . 5 ⊢ (𝜑 → (𝑀 − 𝑀) = 0) |
| 23 | 22 | oveq1d 6064 | . . . 4 ⊢ (𝜑 → ((𝑀 − 𝑀) + 1) = (0 + 1)) |
| 24 | 0p1e1 9347 | . . . 4 ⊢ (0 + 1) = 1 | |
| 25 | 23, 24 | eqtrdi 2281 | . . 3 ⊢ (𝜑 → ((𝑀 − 𝑀) + 1) = 1) |
| 26 | 25 | oveq1d 6064 | . 2 ⊢ (𝜑 → (((𝑀 − 𝑀) + 1)(.g‘𝐺)𝐶) = (1(.g‘𝐺)𝐶)) |
| 27 | 16, 17 | mulg1 13835 | . . 3 ⊢ (𝐶 ∈ 𝐵 → (1(.g‘𝐺)𝐶) = 𝐶) |
| 28 | 14, 27 | syl 14 | . 2 ⊢ (𝜑 → (1(.g‘𝐺)𝐶) = 𝐶) |
| 29 | 20, 26, 28 | 3eqtrd 2269 | 1 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝐴)) = 𝐶) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 Ⅎwnf 1509 ∈ wcel 2203 Ⅎwnfc 2371 {csn 3688 ↦ cmpt 4170 ‘cfv 5351 (class class class)co 6049 0cc0 8123 1c1 8124 + caddc 8126 − cmin 8440 ℤcz 9573 ℤ≥cuz 9849 ...cfz 10338 Basecbs 13201 Σg cgsu 13459 Mndcmnd 13618 .gcmg 13825 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-coll 4224 ax-sep 4227 ax-nul 4235 ax-pow 4286 ax-pr 4321 ax-un 4553 ax-setind 4658 ax-iinf 4709 ax-cnex 8214 ax-resscn 8215 ax-1cn 8216 ax-1re 8217 ax-icn 8218 ax-addcl 8219 ax-addrcl 8220 ax-mulcl 8221 ax-addcom 8223 ax-addass 8225 ax-distr 8227 ax-i2m1 8228 ax-0lt1 8229 ax-0id 8231 ax-rnegex 8232 ax-cnre 8234 ax-pre-ltirr 8235 ax-pre-ltwlin 8236 ax-pre-lttrn 8237 ax-pre-apti 8238 ax-pre-ltadd 8239 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-reu 2527 df-rab 2529 df-v 2814 df-sbc 3042 df-csb 3138 df-dif 3212 df-un 3214 df-in 3216 df-ss 3223 df-nul 3508 df-if 3620 df-pw 3670 df-sn 3694 df-pr 3695 df-op 3697 df-uni 3914 df-int 3949 df-iun 3992 df-br 4109 df-opab 4171 df-mpt 4172 df-tr 4208 df-id 4413 df-iord 4486 df-on 4488 df-ilim 4489 df-suc 4491 df-iom 4712 df-xp 4754 df-rel 4755 df-cnv 4756 df-co 4757 df-dm 4758 df-rn 4759 df-res 4760 df-ima 4761 df-iota 5311 df-fun 5353 df-fn 5354 df-f 5355 df-f1 5356 df-fo 5357 df-f1o 5358 df-fv 5359 df-riota 6002 df-ov 6052 df-oprab 6053 df-mpo 6054 df-1st 6333 df-2nd 6334 df-recs 6535 df-frec 6621 df-1o 6646 df-er 6766 df-en 6975 df-fin 6977 df-pnf 8306 df-mnf 8307 df-xr 8308 df-ltxr 8309 df-le 8310 df-sub 8442 df-neg 8443 df-inn 9234 df-2 9292 df-n0 9493 df-z 9574 df-uz 9850 df-fz 10339 df-seqfrec 10806 df-ndx 13204 df-slot 13205 df-base 13207 df-plusg 13292 df-0g 13460 df-igsum 13461 df-minusg 13706 df-mulg 13826 |
| This theorem is referenced by: gsumsplit0 14052 gsumfzfsumlemm 14722 gfsumsn 16853 |
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