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Theorem gsummulglem 19857

Description: Lemma for gsummulg 19858 and gsummulgz 19859. (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 19713	. . 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 19744	. . . . . 6 ⊢ ((𝐺 ∈ Abel ∧ 𝑁 ∈ ℤ) → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 GrpHom 𝐺))
10		ghmmhm 19147	. . . . . 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 413	. . . 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 19743	. . . . 5 ⊢ ((𝐺 ∈ CMnd ∧ 𝑁 ∈ ℕ₀) → (𝑥 ∈ 𝐵 ↦ (𝑁 · 𝑥)) ∈ (𝐺 MndHom 𝐺))
15	14	ex 412	. . . 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 857	. 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 7420	. 2 ⊢ (𝑥 = 𝑋 → (𝑁 · 𝑥) = (𝑁 · 𝑋))
22		oveq2 7420	. 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 19855	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 395 ∨ wo 844 = wceq 1540 ∈ wcel 2105 class class class wbr 5148 ↦ cmpt 5231 ‘cfv 6543 (class class class)co 7412 finSupp cfsupp 9367 ℕ₀cn0 12479 ℤcz 12565 Basecbs 17151 0_gc0g 17392 Σ_g cgsu 17393 Mndcmnd 18665 MndHom cmhm 18709 ._gcmg 18993 GrpHom cghm 19134 CMndccmn 19696 Abelcabl 19697

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-cnex 11172 ax-resscn 11173 ax-1cn 11174 ax-icn 11175 ax-addcl 11176 ax-addrcl 11177 ax-mulcl 11178 ax-mulrcl 11179 ax-mulcom 11180 ax-addass 11181 ax-mulass 11182 ax-distr 11183 ax-i2m1 11184 ax-1ne0 11185 ax-1rid 11186 ax-rnegex 11187 ax-rrecex 11188 ax-cnre 11189 ax-pre-lttri 11190 ax-pre-lttrn 11191 ax-pre-ltadd 11192 ax-pre-mulgt0 11193

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7860 df-1st 7979 df-2nd 7980 df-supp 8152 df-frecs 8272 df-wrecs 8303 df-recs 8377 df-rdg 8416 df-1o 8472 df-er 8709 df-map 8828 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-fsupp 9368 df-oi 9511 df-card 9940 df-pnf 11257 df-mnf 11258 df-xr 11259 df-ltxr 11260 df-le 11261 df-sub 11453 df-neg 11454 df-nn 12220 df-n0 12480 df-z 12566 df-uz 12830 df-fz 13492 df-fzo 13635 df-seq 13974 df-hash 14298 df-0g 17394 df-gsum 17395 df-mgm 18571 df-sgrp 18650 df-mnd 18666 df-mhm 18711 df-grp 18864 df-minusg 18865 df-mulg 18994 df-ghm 19135 df-cntz 19229 df-cmn 19698 df-abl 19699

This theorem is referenced by: gsummulg 19858 gsummulgz 19859

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