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Theorem gsumconst 18600
Description: Sum of a constant series. (Contributed by Mario Carneiro, 19-Dec-2014.) (Revised by Mario Carneiro, 24-Apr-2016.)
Hypotheses
Ref Expression
gsumconst.b 𝐵 = (Base‘𝐺)
gsumconst.m · = (.g𝐺)
Assertion
Ref Expression
gsumconst ((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋))
Distinct variable groups:   𝐴,𝑘   𝐵,𝑘   𝑘,𝐺   𝑘,𝑋
Allowed substitution hint:   · (𝑘)

Proof of Theorem gsumconst
Dummy variables 𝑓 𝑥 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 simpl3 1246 . . . . 5 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → 𝑋𝐵)
2 gsumconst.b . . . . . 6 𝐵 = (Base‘𝐺)
3 eqid 2765 . . . . . 6 (0g𝐺) = (0g𝐺)
4 gsumconst.m . . . . . 6 · = (.g𝐺)
52, 3, 4mulg0 17815 . . . . 5 (𝑋𝐵 → (0 · 𝑋) = (0g𝐺))
61, 5syl 17 . . . 4 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (0 · 𝑋) = (0g𝐺))
7 fveq2 6375 . . . . . . 7 (𝐴 = ∅ → (♯‘𝐴) = (♯‘∅))
87adantl 473 . . . . . 6 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (♯‘𝐴) = (♯‘∅))
9 hash0 13360 . . . . . 6 (♯‘∅) = 0
108, 9syl6eq 2815 . . . . 5 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (♯‘𝐴) = 0)
1110oveq1d 6857 . . . 4 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → ((♯‘𝐴) · 𝑋) = (0 · 𝑋))
12 mpteq1 4896 . . . . . . . 8 (𝐴 = ∅ → (𝑘𝐴𝑋) = (𝑘 ∈ ∅ ↦ 𝑋))
1312adantl 473 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (𝑘𝐴𝑋) = (𝑘 ∈ ∅ ↦ 𝑋))
14 mpt0 6199 . . . . . . 7 (𝑘 ∈ ∅ ↦ 𝑋) = ∅
1513, 14syl6eq 2815 . . . . . 6 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (𝑘𝐴𝑋) = ∅)
1615oveq2d 6858 . . . . 5 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (𝐺 Σg (𝑘𝐴𝑋)) = (𝐺 Σg ∅))
173gsum0 17546 . . . . 5 (𝐺 Σg ∅) = (0g𝐺)
1816, 17syl6eq 2815 . . . 4 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (𝐺 Σg (𝑘𝐴𝑋)) = (0g𝐺))
196, 11, 183eqtr4rd 2810 . . 3 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ 𝐴 = ∅) → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋))
2019ex 401 . 2 ((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) → (𝐴 = ∅ → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋)))
21 simprl 787 . . . . . . . 8 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (♯‘𝐴) ∈ ℕ)
22 nnuz 11923 . . . . . . . 8 ℕ = (ℤ‘1)
2321, 22syl6eleq 2854 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (♯‘𝐴) ∈ (ℤ‘1))
24 simpr 477 . . . . . . . . 9 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → 𝑥 ∈ (1...(♯‘𝐴)))
25 simpl3 1246 . . . . . . . . . 10 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝑋𝐵)
2625adantr 472 . . . . . . . . 9 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → 𝑋𝐵)
27 eqid 2765 . . . . . . . . . 10 (𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋) = (𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋)
2827fvmpt2 6480 . . . . . . . . 9 ((𝑥 ∈ (1...(♯‘𝐴)) ∧ 𝑋𝐵) → ((𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋)‘𝑥) = 𝑋)
2924, 26, 28syl2anc 579 . . . . . . . 8 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → ((𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋)‘𝑥) = 𝑋)
30 f1of 6320 . . . . . . . . . . . . 13 (𝑓:(1...(♯‘𝐴))–1-1-onto𝐴𝑓:(1...(♯‘𝐴))⟶𝐴)
3130ad2antll 720 . . . . . . . . . . . 12 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝑓:(1...(♯‘𝐴))⟶𝐴)
3231ffvelrnda 6549 . . . . . . . . . . 11 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → (𝑓𝑥) ∈ 𝐴)
3331feqmptd 6438 . . . . . . . . . . 11 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝑓 = (𝑥 ∈ (1...(♯‘𝐴)) ↦ (𝑓𝑥)))
34 eqidd 2766 . . . . . . . . . . 11 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝑘𝐴𝑋) = (𝑘𝐴𝑋))
35 eqidd 2766 . . . . . . . . . . 11 (𝑘 = (𝑓𝑥) → 𝑋 = 𝑋)
3632, 33, 34, 35fmptco 6587 . . . . . . . . . 10 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ((𝑘𝐴𝑋) ∘ 𝑓) = (𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋))
3736fveq1d 6377 . . . . . . . . 9 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (((𝑘𝐴𝑋) ∘ 𝑓)‘𝑥) = ((𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋)‘𝑥))
3837adantr 472 . . . . . . . 8 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → (((𝑘𝐴𝑋) ∘ 𝑓)‘𝑥) = ((𝑥 ∈ (1...(♯‘𝐴)) ↦ 𝑋)‘𝑥))
39 elfznn 12577 . . . . . . . . 9 (𝑥 ∈ (1...(♯‘𝐴)) → 𝑥 ∈ ℕ)
40 fvconst2g 6660 . . . . . . . . 9 ((𝑋𝐵𝑥 ∈ ℕ) → ((ℕ × {𝑋})‘𝑥) = 𝑋)
4125, 39, 40syl2an 589 . . . . . . . 8 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → ((ℕ × {𝑋})‘𝑥) = 𝑋)
4229, 38, 413eqtr4d 2809 . . . . . . 7 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑥 ∈ (1...(♯‘𝐴))) → (((𝑘𝐴𝑋) ∘ 𝑓)‘𝑥) = ((ℕ × {𝑋})‘𝑥))
4323, 42seqfveq 13032 . . . . . 6 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (seq1((+g𝐺), ((𝑘𝐴𝑋) ∘ 𝑓))‘(♯‘𝐴)) = (seq1((+g𝐺), (ℕ × {𝑋}))‘(♯‘𝐴)))
44 eqid 2765 . . . . . . 7 (+g𝐺) = (+g𝐺)
45 eqid 2765 . . . . . . 7 (Cntz‘𝐺) = (Cntz‘𝐺)
46 simpl1 1242 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝐺 ∈ Mnd)
47 simpl2 1244 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝐴 ∈ Fin)
4825adantr 472 . . . . . . . 8 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑘𝐴) → 𝑋𝐵)
4948fmpttd 6575 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝑘𝐴𝑋):𝐴𝐵)
50 eqidd 2766 . . . . . . . . . 10 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝑋(+g𝐺)𝑋) = (𝑋(+g𝐺)𝑋))
512, 44, 45elcntzsn 18023 . . . . . . . . . . 11 (𝑋𝐵 → (𝑋 ∈ ((Cntz‘𝐺)‘{𝑋}) ↔ (𝑋𝐵 ∧ (𝑋(+g𝐺)𝑋) = (𝑋(+g𝐺)𝑋))))
5225, 51syl 17 . . . . . . . . . 10 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝑋 ∈ ((Cntz‘𝐺)‘{𝑋}) ↔ (𝑋𝐵 ∧ (𝑋(+g𝐺)𝑋) = (𝑋(+g𝐺)𝑋))))
5325, 50, 52mpbir2and 704 . . . . . . . . 9 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝑋 ∈ ((Cntz‘𝐺)‘{𝑋}))
5453snssd 4494 . . . . . . . 8 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → {𝑋} ⊆ ((Cntz‘𝐺)‘{𝑋}))
55 snidg 4364 . . . . . . . . . . . 12 (𝑋𝐵𝑋 ∈ {𝑋})
5625, 55syl 17 . . . . . . . . . . 11 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝑋 ∈ {𝑋})
5756adantr 472 . . . . . . . . . 10 ((((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) ∧ 𝑘𝐴) → 𝑋 ∈ {𝑋})
5857fmpttd 6575 . . . . . . . . 9 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝑘𝐴𝑋):𝐴⟶{𝑋})
5958frnd 6230 . . . . . . . 8 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ran (𝑘𝐴𝑋) ⊆ {𝑋})
6045cntzidss 18035 . . . . . . . 8 (({𝑋} ⊆ ((Cntz‘𝐺)‘{𝑋}) ∧ ran (𝑘𝐴𝑋) ⊆ {𝑋}) → ran (𝑘𝐴𝑋) ⊆ ((Cntz‘𝐺)‘ran (𝑘𝐴𝑋)))
6154, 59, 60syl2anc 579 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ran (𝑘𝐴𝑋) ⊆ ((Cntz‘𝐺)‘ran (𝑘𝐴𝑋)))
62 f1of1 6319 . . . . . . . 8 (𝑓:(1...(♯‘𝐴))–1-1-onto𝐴𝑓:(1...(♯‘𝐴))–1-1𝐴)
6362ad2antll 720 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → 𝑓:(1...(♯‘𝐴))–1-1𝐴)
64 suppssdm 7510 . . . . . . . . 9 ((𝑘𝐴𝑋) supp (0g𝐺)) ⊆ dom (𝑘𝐴𝑋)
65 eqid 2765 . . . . . . . . . . 11 (𝑘𝐴𝑋) = (𝑘𝐴𝑋)
6665dmmptss 5817 . . . . . . . . . 10 dom (𝑘𝐴𝑋) ⊆ 𝐴
6766a1i 11 . . . . . . . . 9 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → dom (𝑘𝐴𝑋) ⊆ 𝐴)
6864, 67syl5ss 3772 . . . . . . . 8 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ((𝑘𝐴𝑋) supp (0g𝐺)) ⊆ 𝐴)
69 f1ofo 6327 . . . . . . . . . 10 (𝑓:(1...(♯‘𝐴))–1-1-onto𝐴𝑓:(1...(♯‘𝐴))–onto𝐴)
70 forn 6301 . . . . . . . . . 10 (𝑓:(1...(♯‘𝐴))–onto𝐴 → ran 𝑓 = 𝐴)
7169, 70syl 17 . . . . . . . . 9 (𝑓:(1...(♯‘𝐴))–1-1-onto𝐴 → ran 𝑓 = 𝐴)
7271ad2antll 720 . . . . . . . 8 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ran 𝑓 = 𝐴)
7368, 72sseqtr4d 3802 . . . . . . 7 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ((𝑘𝐴𝑋) supp (0g𝐺)) ⊆ ran 𝑓)
74 eqid 2765 . . . . . . 7 (((𝑘𝐴𝑋) ∘ 𝑓) supp (0g𝐺)) = (((𝑘𝐴𝑋) ∘ 𝑓) supp (0g𝐺))
752, 3, 44, 45, 46, 47, 49, 61, 21, 63, 73, 74gsumval3 18574 . . . . . 6 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝐺 Σg (𝑘𝐴𝑋)) = (seq1((+g𝐺), ((𝑘𝐴𝑋) ∘ 𝑓))‘(♯‘𝐴)))
76 eqid 2765 . . . . . . . 8 seq1((+g𝐺), (ℕ × {𝑋})) = seq1((+g𝐺), (ℕ × {𝑋}))
772, 44, 4, 76mulgnn 17816 . . . . . . 7 (((♯‘𝐴) ∈ ℕ ∧ 𝑋𝐵) → ((♯‘𝐴) · 𝑋) = (seq1((+g𝐺), (ℕ × {𝑋}))‘(♯‘𝐴)))
7821, 25, 77syl2anc 579 . . . . . 6 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → ((♯‘𝐴) · 𝑋) = (seq1((+g𝐺), (ℕ × {𝑋}))‘(♯‘𝐴)))
7943, 75, 783eqtr4d 2809 . . . . 5 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ ((♯‘𝐴) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)) → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋))
8079expr 448 . . . 4 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ (♯‘𝐴) ∈ ℕ) → (𝑓:(1...(♯‘𝐴))–1-1-onto𝐴 → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋)))
8180exlimdv 2028 . . 3 (((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) ∧ (♯‘𝐴) ∈ ℕ) → (∃𝑓 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴 → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋)))
8281expimpd 445 . 2 ((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) → (((♯‘𝐴) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴) → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋)))
83 fz1f1o 14728 . . 3 (𝐴 ∈ Fin → (𝐴 = ∅ ∨ ((♯‘𝐴) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)))
84833ad2ant2 1164 . 2 ((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) → (𝐴 = ∅ ∨ ((♯‘𝐴) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝐴))–1-1-onto𝐴)))
8520, 82, 84mpjaod 886 1 ((𝐺 ∈ Mnd ∧ 𝐴 ∈ Fin ∧ 𝑋𝐵) → (𝐺 Σg (𝑘𝐴𝑋)) = ((♯‘𝐴) · 𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 197  wa 384  wo 873  w3a 1107   = wceq 1652  wex 1874  wcel 2155  wss 3732  c0 4079  {csn 4334  cmpt 4888   × cxp 5275  dom cdm 5277  ran crn 5278  ccom 5281  wf 6064  1-1wf1 6065  ontowfo 6066  1-1-ontowf1o 6067  cfv 6068  (class class class)co 6842   supp csupp 7497  Fincfn 8160  0cc0 10189  1c1 10190  cn 11274  cuz 11886  ...cfz 12533  seqcseq 13008  chash 13321  Basecbs 16132  +gcplusg 16216  0gc0g 16368   Σg cgsu 16369  Mndcmnd 17562  .gcmg 17809  Cntzccntz 18013
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4930  ax-sep 4941  ax-nul 4949  ax-pow 5001  ax-pr 5062  ax-un 7147  ax-inf2 8753  ax-cnex 10245  ax-resscn 10246  ax-1cn 10247  ax-icn 10248  ax-addcl 10249  ax-addrcl 10250  ax-mulcl 10251  ax-mulrcl 10252  ax-mulcom 10253  ax-addass 10254  ax-mulass 10255  ax-distr 10256  ax-i2m1 10257  ax-1ne0 10258  ax-1rid 10259  ax-rnegex 10260  ax-rrecex 10261  ax-cnre 10262  ax-pre-lttri 10263  ax-pre-lttrn 10264  ax-pre-ltadd 10265  ax-pre-mulgt0 10266
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-nel 3041  df-ral 3060  df-rex 3061  df-reu 3062  df-rmo 3063  df-rab 3064  df-v 3352  df-sbc 3597  df-csb 3692  df-dif 3735  df-un 3737  df-in 3739  df-ss 3746  df-pss 3748  df-nul 4080  df-if 4244  df-pw 4317  df-sn 4335  df-pr 4337  df-tp 4339  df-op 4341  df-uni 4595  df-int 4634  df-iun 4678  df-br 4810  df-opab 4872  df-mpt 4889  df-tr 4912  df-id 5185  df-eprel 5190  df-po 5198  df-so 5199  df-fr 5236  df-se 5237  df-we 5238  df-xp 5283  df-rel 5284  df-cnv 5285  df-co 5286  df-dm 5287  df-rn 5288  df-res 5289  df-ima 5290  df-pred 5865  df-ord 5911  df-on 5912  df-lim 5913  df-suc 5914  df-iota 6031  df-fun 6070  df-fn 6071  df-f 6072  df-f1 6073  df-fo 6074  df-f1o 6075  df-fv 6076  df-isom 6077  df-riota 6803  df-ov 6845  df-oprab 6846  df-mpt2 6847  df-om 7264  df-1st 7366  df-2nd 7367  df-supp 7498  df-wrecs 7610  df-recs 7672  df-rdg 7710  df-1o 7764  df-oadd 7768  df-er 7947  df-en 8161  df-dom 8162  df-sdom 8163  df-fin 8164  df-oi 8622  df-card 9016  df-pnf 10330  df-mnf 10331  df-xr 10332  df-ltxr 10333  df-le 10334  df-sub 10522  df-neg 10523  df-nn 11275  df-n0 11539  df-z 11625  df-uz 11887  df-fz 12534  df-fzo 12674  df-seq 13009  df-hash 13322  df-0g 16370  df-gsum 16371  df-mgm 17510  df-sgrp 17552  df-mnd 17563  df-mulg 17810  df-cntz 18015
This theorem is referenced by:  gsumconstf  18601  mdetdiagid  20683  chpscmat  20926  chp0mat  20930  chpidmat  20931  tmdgsum2  22179  amgmlem  25007  lgseisenlem4  25394
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