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| Mirrors > Home > MPE Home > Th. List > gsumdifsnd | Structured version Visualization version GIF version | ||
| Description: Extract a summand from a finitely supported group sum. (Contributed by AV, 21-Apr-2019.) (Revised by AV, 28-Jul-2019.) |
| Ref | Expression |
|---|---|
| gsumdifsnd.b | ⊢ 𝐵 = (Base‘𝐺) |
| gsumdifsnd.p | ⊢ + = (+g‘𝐺) |
| gsumdifsnd.g | ⊢ (𝜑 → 𝐺 ∈ CMnd) |
| gsumdifsnd.a | ⊢ (𝜑 → 𝐴 ∈ 𝑊) |
| gsumdifsnd.f | ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝑋) finSupp (0g‘𝐺)) |
| gsumdifsnd.e | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑋 ∈ 𝐵) |
| gsumdifsnd.m | ⊢ (𝜑 → 𝑀 ∈ 𝐴) |
| gsumdifsnd.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| gsumdifsnd.s | ⊢ ((𝜑 ∧ 𝑘 = 𝑀) → 𝑋 = 𝑌) |
| Ref | Expression |
|---|---|
| gsumdifsnd | ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ 𝐴 ↦ 𝑋)) = ((𝐺 Σg (𝑘 ∈ (𝐴 ∖ {𝑀}) ↦ 𝑋)) + 𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | gsumdifsnd.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
| 2 | eqid 2765 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 3 | gsumdifsnd.p | . . 3 ⊢ + = (+g‘𝐺) | |
| 4 | gsumdifsnd.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ CMnd) | |
| 5 | gsumdifsnd.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑊) | |
| 6 | gsumdifsnd.e | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑋 ∈ 𝐵) | |
| 7 | gsumdifsnd.f | . . 3 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝑋) finSupp (0g‘𝐺)) | |
| 8 | gsumdifsnd.m | . . . . . 6 ⊢ (𝜑 → 𝑀 ∈ 𝐴) | |
| 9 | 8 | snssd 4754 | . . . . 5 ⊢ (𝜑 → {𝑀} ⊆ 𝐴) |
| 10 | difin2 4254 | . . . . 5 ⊢ ({𝑀} ⊆ 𝐴 → ({𝑀} ∖ {𝑀}) = ((𝐴 ∖ {𝑀}) ∩ {𝑀})) | |
| 11 | 9, 10 | syl 18 | . . . 4 ⊢ (𝜑 → ({𝑀} ∖ {𝑀}) = ((𝐴 ∖ {𝑀}) ∩ {𝑀})) |
| 12 | difid 4332 | . . . 4 ⊢ ({𝑀} ∖ {𝑀}) = ∅ | |
| 13 | 11, 12 | eqtr3di 2815 | . . 3 ⊢ (𝜑 → ((𝐴 ∖ {𝑀}) ∩ {𝑀}) = ∅) |
| 14 | difsnid 4778 | . . . . 5 ⊢ (𝑀 ∈ 𝐴 → ((𝐴 ∖ {𝑀}) ∪ {𝑀}) = 𝐴) | |
| 15 | 8, 14 | syl 18 | . . . 4 ⊢ (𝜑 → ((𝐴 ∖ {𝑀}) ∪ {𝑀}) = 𝐴) |
| 16 | 15 | eqcomd 2771 | . . 3 ⊢ (𝜑 → 𝐴 = ((𝐴 ∖ {𝑀}) ∪ {𝑀})) |
| 17 | 1, 2, 3, 4, 5, 6, 7, 13, 16 | gsumsplit2 20022 | . 2 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ 𝐴 ↦ 𝑋)) = ((𝐺 Σg (𝑘 ∈ (𝐴 ∖ {𝑀}) ↦ 𝑋)) + (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝑋)))) |
| 18 | cmnmnd 19890 | . . . . 5 ⊢ (𝐺 ∈ CMnd → 𝐺 ∈ Mnd) | |
| 19 | 4, 18 | syl 18 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ Mnd) |
| 20 | gsumdifsnd.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 21 | gsumdifsnd.s | . . . 4 ⊢ ((𝜑 ∧ 𝑘 = 𝑀) → 𝑋 = 𝑌) | |
| 22 | 1, 19, 8, 20, 21 | gsumsnd 20045 | . . 3 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝑋)) = 𝑌) |
| 23 | 22 | oveq2d 7432 | . 2 ⊢ (𝜑 → ((𝐺 Σg (𝑘 ∈ (𝐴 ∖ {𝑀}) ↦ 𝑋)) + (𝐺 Σg (𝑘 ∈ {𝑀} ↦ 𝑋))) = ((𝐺 Σg (𝑘 ∈ (𝐴 ∖ {𝑀}) ↦ 𝑋)) + 𝑌)) |
| 24 | 17, 23 | eqtrd 2800 | 1 ⊢ (𝜑 → (𝐺 Σg (𝑘 ∈ 𝐴 ↦ 𝑋)) = ((𝐺 Σg (𝑘 ∈ (𝐴 ∖ {𝑀}) ↦ 𝑋)) + 𝑌)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 ∖ cdif 3903 ∪ cun 3904 ∩ cin 3905 ⊆ wss 3906 ∅c0 4286 {csn 4591 class class class wbr 5111 ↦ cmpt 5194 ‘cfv 6540 (class class class)co 7416 finSupp cfsupp 9324 Basecbs 17286 +gcplusg 17327 0gc0g 17509 Σg cgsu 17510 Mndcmnd 18813 CMndccmn 19873 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-cnex 11167 ax-resscn 11168 ax-1cn 11169 ax-icn 11170 ax-addcl 11171 ax-addrcl 11172 ax-mulcl 11173 ax-mulrcl 11174 ax-mulcom 11175 ax-addass 11176 ax-mulass 11177 ax-distr 11178 ax-i2m1 11179 ax-1ne0 11180 ax-1rid 11181 ax-rnegex 11182 ax-rrecex 11183 ax-cnre 11184 ax-pre-lttri 11185 ax-pre-lttrn 11186 ax-pre-ltadd 11187 ax-pre-mulgt0 11188 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-iin 4961 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-of 7680 df-om 7865 df-1st 7988 df-2nd 7989 df-supp 8159 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-2o 8456 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fsupp 9325 df-oi 9475 df-card 9937 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-sub 11454 df-neg 11455 df-nn 12245 df-2 12314 df-n0 12516 df-z 12603 df-uz 12874 df-fz 13547 df-fzo 13695 df-seq 14051 df-hash 14380 df-sets 17241 df-slot 17259 df-ndx 17271 df-base 17287 df-ress 17308 df-plusg 17340 df-0g 17511 df-gsum 17512 df-mre 17655 df-mrc 17656 df-acs 17658 df-mgm 18715 df-sgrp 18798 df-mnd 18814 df-submnd 18865 df-mulg 19157 df-cntz 19410 df-cmn 19875 |
| This theorem is used by: dmatmul 22683 matunitlindflem1 38300 lincdifsn 49237 |
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