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Theorem gsummulglem 19908

Description: Lemma for gsummulg 19909 and gsummulgz 19910. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by AV, 6-Jun-2019.)

**Hypotheses**
Ref	Expression
gsummulg.b	⊢ 𝐵 = (Base‘𝐺)
gsummulg.z	⊢ 0 = (0_g‘𝐺)
gsummulg.t	⊢ · = (._g‘𝐺)
gsummulg.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
gsummulg.f	⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑋 ∈ 𝐵)
gsummulg.w	⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝑋) finSupp 0 )
gsummulglem.g	⊢ (𝜑 → 𝐺 ∈ CMnd)
gsummulglem.n	⊢ (𝜑 → 𝑁 ∈ ℤ)
gsummulglem.o	⊢ (𝜑 → (𝐺 ∈ Abel ∨ 𝑁 ∈ ℕ₀))

**Assertion**
Ref	Expression
gsummulglem	⊢ (𝜑 → (𝐺 Σ_g (𝑘 ∈ 𝐴 ↦ (𝑁 · 𝑋))) = (𝑁 · (𝐺 Σ_g (𝑘 ∈ 𝐴 ↦ 𝑋))))

Distinct variable groups: 𝐴,𝑘 𝐵,𝑘 𝑘,𝑁 𝜑,𝑘 · ,𝑘 Allowed substitution hints: 𝐺(𝑘) 𝑉(𝑘) 𝑋(𝑘) 0 (𝑘)

Proof of Theorem gsummulglem Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		gsummulg.b	. 2 ⊢ 𝐵 = (Base‘𝐺)
2		gsummulg.z	. 2 ⊢ 0 = (0_g‘𝐺)
3		gsummulglem.g	. 2 ⊢ (𝜑 → 𝐺 ∈ CMnd)
4		cmnmnd 19764	. . 3 ⊢ (𝐺 ∈ CMnd → 𝐺 ∈ Mnd)
5	3, 4	syl 17	. 2 ⊢ (𝜑 → 𝐺 ∈ Mnd)
6		gsummulg.a	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
7		gsummulglem.n	. . . 4 ⊢ (𝜑 → 𝑁 ∈ ℤ)
8		gsummulg.t	. . . . . . 7 ⊢ · = (._g‘𝐺)
9	1, 8	mulgghm 19795	. . . . . 6 ⊢ ((𝐺 ∈ Abel ∧ 𝑁 ∈ ℤ) → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 GrpHom 𝐺))
10		ghmmhm 19193	. . . . . 6 ⊢ ((𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 GrpHom 𝐺) → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺))
11	9, 10	syl 17	. . . . 5 ⊢ ((𝐺 ∈ Abel ∧ 𝑁 ∈ ℤ) → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺))
12	11	expcom 414	. . . 4 ⊢ (𝑁 ∈ ℤ → (𝐺 ∈ Abel → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺)))
13	7, 12	syl 17	. . 3 ⊢ (𝜑 → (𝐺 ∈ Abel → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺)))
14	1, 8	mulgmhm 19794	. . . . 5 ⊢ ((𝐺 ∈ CMnd ∧ 𝑁 ∈ ℕ₀) → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺))
15	14	ex 413	. . . 4 ⊢ (𝐺 ∈ CMnd → (𝑁 ∈ ℕ₀ → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺)))
16	3, 15	syl 17	. . 3 ⊢ (𝜑 → (𝑁 ∈ ℕ₀ → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺)))
17		gsummulglem.o	. . 3 ⊢ (𝜑 → (𝐺 ∈ Abel ∨ 𝑁 ∈ ℕ₀))
18	13, 16, 17	mpjaod 866	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺))
19		gsummulg.f	. 2 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑋 ∈ 𝐵)
20		gsummulg.w	. 2 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝑋) finSupp 0 )
21		oveq2 7365	. 2 ⊢ (𝑥 = 𝑋 → (𝑁 · 𝑥) = (𝑁 · 𝑋))
22		oveq2 7365	. 2 ⊢ (𝑥 = (𝐺 Σ_g (𝑘 ∈ 𝐴 ↦ 𝑋)) → (𝑁 · 𝑥) = (𝑁 · (𝐺 Σ_g (𝑘 ∈ 𝐴 ↦ 𝑋))))
23	1, 2, 3, 5, 6, 18, 19, 20, 21, 22	gsummhm2 19906	1 ⊢ (𝜑 → (𝐺 Σ_g (𝑘 ∈ 𝐴 ↦ (𝑁 · 𝑋))) = (𝑁 · (𝐺 Σ_g (𝑘 ∈ 𝐴 ↦ 𝑋))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 396 ∨ wo 853 = wceq 1547 ∈ wcel 2119 class class class wbr 5073 ↦ cmpt 5154 ‘cfv 6486 (class class class)co 7357 finSupp cfsupp 9265 ℕ₀cn0 12429 ℤcz 12516 Basecbs 17171 0_gc0g 17394 Σ_g cgsu 17395 Mndcmnd 18694 MndHom cmhm 18741 ._gcmg 19035 GrpHom cghm 19179 CMndccmn 19747 Abelcabl 19748

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5200 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107

This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rmo 3344 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-int 4879 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-tr 5181 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-se 5573 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-isom 6495 df-riota 7314 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7808 df-1st 7932 df-2nd 7933 df-supp 8102 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-er 8634 df-map 8766 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-fsupp 9266 df-oi 9416 df-card 9855 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-nn 12167 df-n0 12430 df-z 12517 df-uz 12781 df-fz 13454 df-fzo 13601 df-seq 13956 df-hash 14285 df-0g 17396 df-gsum 17397 df-mgm 18600 df-sgrp 18679 df-mnd 18695 df-mhm 18743 df-grp 18904 df-minusg 18905 df-mulg 19036 df-ghm 19180 df-cntz 19284 df-cmn 19749 df-abl 19750

This theorem is referenced by: gsummulg 19909 gsummulgz 19910

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