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Theorem bccolsum 32975
Description: A column-sum rule for binomial coefficents. (Contributed by Scott Fenton, 24-Jun-2020.)
Assertion
Ref Expression
bccolsum ((𝑁 ∈ ℕ0𝐶 ∈ ℕ0) → Σ𝑘 ∈ (0...𝑁)(𝑘C𝐶) = ((𝑁 + 1)C(𝐶 + 1)))
Distinct variable groups:   𝑘,𝑁   𝐶,𝑘

Proof of Theorem bccolsum
Dummy variables 𝑛 𝑚 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 oveq2 7167 . . . . . 6 (𝑚 = 0 → (0...𝑚) = (0...0))
21sumeq1d 15061 . . . . 5 (𝑚 = 0 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = Σ𝑘 ∈ (0...0)(𝑘C𝐶))
3 oveq1 7166 . . . . . . 7 (𝑚 = 0 → (𝑚 + 1) = (0 + 1))
4 0p1e1 11762 . . . . . . 7 (0 + 1) = 1
53, 4syl6eq 2875 . . . . . 6 (𝑚 = 0 → (𝑚 + 1) = 1)
65oveq1d 7174 . . . . 5 (𝑚 = 0 → ((𝑚 + 1)C(𝐶 + 1)) = (1C(𝐶 + 1)))
72, 6eqeq12d 2840 . . . 4 (𝑚 = 0 → (Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1)) ↔ Σ𝑘 ∈ (0...0)(𝑘C𝐶) = (1C(𝐶 + 1))))
87imbi2d 343 . . 3 (𝑚 = 0 → ((𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1))) ↔ (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...0)(𝑘C𝐶) = (1C(𝐶 + 1)))))
9 oveq2 7167 . . . . . 6 (𝑚 = 𝑛 → (0...𝑚) = (0...𝑛))
109sumeq1d 15061 . . . . 5 (𝑚 = 𝑛 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶))
11 oveq1 7166 . . . . . 6 (𝑚 = 𝑛 → (𝑚 + 1) = (𝑛 + 1))
1211oveq1d 7174 . . . . 5 (𝑚 = 𝑛 → ((𝑚 + 1)C(𝐶 + 1)) = ((𝑛 + 1)C(𝐶 + 1)))
1310, 12eqeq12d 2840 . . . 4 (𝑚 = 𝑛 → (Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1)) ↔ Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1))))
1413imbi2d 343 . . 3 (𝑚 = 𝑛 → ((𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1))) ↔ (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1)))))
15 oveq2 7167 . . . . . 6 (𝑚 = (𝑛 + 1) → (0...𝑚) = (0...(𝑛 + 1)))
1615sumeq1d 15061 . . . . 5 (𝑚 = (𝑛 + 1) → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶))
17 oveq1 7166 . . . . . 6 (𝑚 = (𝑛 + 1) → (𝑚 + 1) = ((𝑛 + 1) + 1))
1817oveq1d 7174 . . . . 5 (𝑚 = (𝑛 + 1) → ((𝑚 + 1)C(𝐶 + 1)) = (((𝑛 + 1) + 1)C(𝐶 + 1)))
1916, 18eqeq12d 2840 . . . 4 (𝑚 = (𝑛 + 1) → (Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1)) ↔ Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (((𝑛 + 1) + 1)C(𝐶 + 1))))
2019imbi2d 343 . . 3 (𝑚 = (𝑛 + 1) → ((𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1))) ↔ (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (((𝑛 + 1) + 1)C(𝐶 + 1)))))
21 oveq2 7167 . . . . . 6 (𝑚 = 𝑁 → (0...𝑚) = (0...𝑁))
2221sumeq1d 15061 . . . . 5 (𝑚 = 𝑁 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = Σ𝑘 ∈ (0...𝑁)(𝑘C𝐶))
23 oveq1 7166 . . . . . 6 (𝑚 = 𝑁 → (𝑚 + 1) = (𝑁 + 1))
2423oveq1d 7174 . . . . 5 (𝑚 = 𝑁 → ((𝑚 + 1)C(𝐶 + 1)) = ((𝑁 + 1)C(𝐶 + 1)))
2522, 24eqeq12d 2840 . . . 4 (𝑚 = 𝑁 → (Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1)) ↔ Σ𝑘 ∈ (0...𝑁)(𝑘C𝐶) = ((𝑁 + 1)C(𝐶 + 1))))
2625imbi2d 343 . . 3 (𝑚 = 𝑁 → ((𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑚)(𝑘C𝐶) = ((𝑚 + 1)C(𝐶 + 1))) ↔ (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑁)(𝑘C𝐶) = ((𝑁 + 1)C(𝐶 + 1)))))
27 0z 11995 . . . . 5 0 ∈ ℤ
28 0nn0 11915 . . . . . . 7 0 ∈ ℕ0
29 nn0z 12008 . . . . . . 7 (𝐶 ∈ ℕ0𝐶 ∈ ℤ)
30 bccl 13685 . . . . . . 7 ((0 ∈ ℕ0𝐶 ∈ ℤ) → (0C𝐶) ∈ ℕ0)
3128, 29, 30sylancr 589 . . . . . 6 (𝐶 ∈ ℕ0 → (0C𝐶) ∈ ℕ0)
3231nn0cnd 11960 . . . . 5 (𝐶 ∈ ℕ0 → (0C𝐶) ∈ ℂ)
33 oveq1 7166 . . . . . 6 (𝑘 = 0 → (𝑘C𝐶) = (0C𝐶))
3433fsum1 15105 . . . . 5 ((0 ∈ ℤ ∧ (0C𝐶) ∈ ℂ) → Σ𝑘 ∈ (0...0)(𝑘C𝐶) = (0C𝐶))
3527, 32, 34sylancr 589 . . . 4 (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...0)(𝑘C𝐶) = (0C𝐶))
36 elnn0 11902 . . . . 5 (𝐶 ∈ ℕ0 ↔ (𝐶 ∈ ℕ ∨ 𝐶 = 0))
37 1red 10645 . . . . . . . . . . 11 (𝐶 ∈ ℕ → 1 ∈ ℝ)
38 nnrp 12403 . . . . . . . . . . 11 (𝐶 ∈ ℕ → 𝐶 ∈ ℝ+)
3937, 38ltaddrp2d 12468 . . . . . . . . . 10 (𝐶 ∈ ℕ → 1 < (𝐶 + 1))
40 peano2nn 11653 . . . . . . . . . . . 12 (𝐶 ∈ ℕ → (𝐶 + 1) ∈ ℕ)
4140nnred 11656 . . . . . . . . . . 11 (𝐶 ∈ ℕ → (𝐶 + 1) ∈ ℝ)
4237, 41ltnled 10790 . . . . . . . . . 10 (𝐶 ∈ ℕ → (1 < (𝐶 + 1) ↔ ¬ (𝐶 + 1) ≤ 1))
4339, 42mpbid 234 . . . . . . . . 9 (𝐶 ∈ ℕ → ¬ (𝐶 + 1) ≤ 1)
44 elfzle2 12914 . . . . . . . . 9 ((𝐶 + 1) ∈ (0...1) → (𝐶 + 1) ≤ 1)
4543, 44nsyl 142 . . . . . . . 8 (𝐶 ∈ ℕ → ¬ (𝐶 + 1) ∈ (0...1))
4645iffalsed 4481 . . . . . . 7 (𝐶 ∈ ℕ → if((𝐶 + 1) ∈ (0...1), ((!‘1) / ((!‘(1 − (𝐶 + 1))) · (!‘(𝐶 + 1)))), 0) = 0)
47 1nn0 11916 . . . . . . . 8 1 ∈ ℕ0
4840nnzd 12089 . . . . . . . 8 (𝐶 ∈ ℕ → (𝐶 + 1) ∈ ℤ)
49 bcval 13667 . . . . . . . 8 ((1 ∈ ℕ0 ∧ (𝐶 + 1) ∈ ℤ) → (1C(𝐶 + 1)) = if((𝐶 + 1) ∈ (0...1), ((!‘1) / ((!‘(1 − (𝐶 + 1))) · (!‘(𝐶 + 1)))), 0))
5047, 48, 49sylancr 589 . . . . . . 7 (𝐶 ∈ ℕ → (1C(𝐶 + 1)) = if((𝐶 + 1) ∈ (0...1), ((!‘1) / ((!‘(1 − (𝐶 + 1))) · (!‘(𝐶 + 1)))), 0))
51 bc0k 13674 . . . . . . 7 (𝐶 ∈ ℕ → (0C𝐶) = 0)
5246, 50, 513eqtr4rd 2870 . . . . . 6 (𝐶 ∈ ℕ → (0C𝐶) = (1C(𝐶 + 1)))
53 bcnn 13675 . . . . . . . . 9 (0 ∈ ℕ0 → (0C0) = 1)
5428, 53ax-mp 5 . . . . . . . 8 (0C0) = 1
55 bcnn 13675 . . . . . . . . 9 (1 ∈ ℕ0 → (1C1) = 1)
5647, 55ax-mp 5 . . . . . . . 8 (1C1) = 1
5754, 56eqtr4i 2850 . . . . . . 7 (0C0) = (1C1)
58 oveq2 7167 . . . . . . 7 (𝐶 = 0 → (0C𝐶) = (0C0))
59 oveq1 7166 . . . . . . . . 9 (𝐶 = 0 → (𝐶 + 1) = (0 + 1))
6059, 4syl6eq 2875 . . . . . . . 8 (𝐶 = 0 → (𝐶 + 1) = 1)
6160oveq2d 7175 . . . . . . 7 (𝐶 = 0 → (1C(𝐶 + 1)) = (1C1))
6257, 58, 613eqtr4a 2885 . . . . . 6 (𝐶 = 0 → (0C𝐶) = (1C(𝐶 + 1)))
6352, 62jaoi 853 . . . . 5 ((𝐶 ∈ ℕ ∨ 𝐶 = 0) → (0C𝐶) = (1C(𝐶 + 1)))
6436, 63sylbi 219 . . . 4 (𝐶 ∈ ℕ0 → (0C𝐶) = (1C(𝐶 + 1)))
6535, 64eqtrd 2859 . . 3 (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...0)(𝑘C𝐶) = (1C(𝐶 + 1)))
66 elnn0uz 12286 . . . . . . . . . 10 (𝑛 ∈ ℕ0𝑛 ∈ (ℤ‘0))
6766biimpi 218 . . . . . . . . 9 (𝑛 ∈ ℕ0𝑛 ∈ (ℤ‘0))
6867adantr 483 . . . . . . . 8 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → 𝑛 ∈ (ℤ‘0))
69 elfznn0 13003 . . . . . . . . . . 11 (𝑘 ∈ (0...(𝑛 + 1)) → 𝑘 ∈ ℕ0)
7069adantl 484 . . . . . . . . . 10 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ 𝑘 ∈ (0...(𝑛 + 1))) → 𝑘 ∈ ℕ0)
71 simplr 767 . . . . . . . . . . 11 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ 𝑘 ∈ (0...(𝑛 + 1))) → 𝐶 ∈ ℕ0)
7271nn0zd 12088 . . . . . . . . . 10 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ 𝑘 ∈ (0...(𝑛 + 1))) → 𝐶 ∈ ℤ)
73 bccl 13685 . . . . . . . . . 10 ((𝑘 ∈ ℕ0𝐶 ∈ ℤ) → (𝑘C𝐶) ∈ ℕ0)
7470, 72, 73syl2anc 586 . . . . . . . . 9 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ 𝑘 ∈ (0...(𝑛 + 1))) → (𝑘C𝐶) ∈ ℕ0)
7574nn0cnd 11960 . . . . . . . 8 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ 𝑘 ∈ (0...(𝑛 + 1))) → (𝑘C𝐶) ∈ ℂ)
76 oveq1 7166 . . . . . . . 8 (𝑘 = (𝑛 + 1) → (𝑘C𝐶) = ((𝑛 + 1)C𝐶))
7768, 75, 76fsump1 15114 . . . . . . 7 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) + ((𝑛 + 1)C𝐶)))
7877adantr 483 . . . . . 6 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1))) → Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) + ((𝑛 + 1)C𝐶)))
79 id 22 . . . . . . 7 𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1)) → Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1)))
80 nn0cn 11910 . . . . . . . . . . 11 (𝐶 ∈ ℕ0𝐶 ∈ ℂ)
8180adantl 484 . . . . . . . . . 10 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → 𝐶 ∈ ℂ)
82 1cnd 10639 . . . . . . . . . 10 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → 1 ∈ ℂ)
8381, 82pncand 11001 . . . . . . . . 9 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → ((𝐶 + 1) − 1) = 𝐶)
8483oveq2d 7175 . . . . . . . 8 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → ((𝑛 + 1)C((𝐶 + 1) − 1)) = ((𝑛 + 1)C𝐶))
8584eqcomd 2830 . . . . . . 7 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → ((𝑛 + 1)C𝐶) = ((𝑛 + 1)C((𝐶 + 1) − 1)))
8679, 85oveqan12rd 7179 . . . . . 6 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1))) → (Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) + ((𝑛 + 1)C𝐶)) = (((𝑛 + 1)C(𝐶 + 1)) + ((𝑛 + 1)C((𝐶 + 1) − 1))))
87 peano2nn0 11940 . . . . . . . 8 (𝑛 ∈ ℕ0 → (𝑛 + 1) ∈ ℕ0)
88 peano2nn0 11940 . . . . . . . . 9 (𝐶 ∈ ℕ0 → (𝐶 + 1) ∈ ℕ0)
8988nn0zd 12088 . . . . . . . 8 (𝐶 ∈ ℕ0 → (𝐶 + 1) ∈ ℤ)
90 bcpasc 13684 . . . . . . . 8 (((𝑛 + 1) ∈ ℕ0 ∧ (𝐶 + 1) ∈ ℤ) → (((𝑛 + 1)C(𝐶 + 1)) + ((𝑛 + 1)C((𝐶 + 1) − 1))) = (((𝑛 + 1) + 1)C(𝐶 + 1)))
9187, 89, 90syl2an 597 . . . . . . 7 ((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) → (((𝑛 + 1)C(𝐶 + 1)) + ((𝑛 + 1)C((𝐶 + 1) − 1))) = (((𝑛 + 1) + 1)C(𝐶 + 1)))
9291adantr 483 . . . . . 6 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1))) → (((𝑛 + 1)C(𝐶 + 1)) + ((𝑛 + 1)C((𝐶 + 1) − 1))) = (((𝑛 + 1) + 1)C(𝐶 + 1)))
9378, 86, 923eqtrd 2863 . . . . 5 (((𝑛 ∈ ℕ0𝐶 ∈ ℕ0) ∧ Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1))) → Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (((𝑛 + 1) + 1)C(𝐶 + 1)))
9493exp31 422 . . . 4 (𝑛 ∈ ℕ0 → (𝐶 ∈ ℕ0 → (Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1)) → Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (((𝑛 + 1) + 1)C(𝐶 + 1)))))
9594a2d 29 . . 3 (𝑛 ∈ ℕ0 → ((𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑛)(𝑘C𝐶) = ((𝑛 + 1)C(𝐶 + 1))) → (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...(𝑛 + 1))(𝑘C𝐶) = (((𝑛 + 1) + 1)C(𝐶 + 1)))))
968, 14, 20, 26, 65, 95nn0ind 12080 . 2 (𝑁 ∈ ℕ0 → (𝐶 ∈ ℕ0 → Σ𝑘 ∈ (0...𝑁)(𝑘C𝐶) = ((𝑁 + 1)C(𝐶 + 1))))
9796imp 409 1 ((𝑁 ∈ ℕ0𝐶 ∈ ℕ0) → Σ𝑘 ∈ (0...𝑁)(𝑘C𝐶) = ((𝑁 + 1)C(𝐶 + 1)))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 398  wo 843   = wceq 1536  wcel 2113  ifcif 4470   class class class wbr 5069  cfv 6358  (class class class)co 7159  cc 10538  0cc0 10540  1c1 10541   + caddc 10543   · cmul 10545   < clt 10678  cle 10679  cmin 10873   / cdiv 11300  cn 11641  0cn0 11900  cz 11984  cuz 12246  ...cfz 12895  !cfa 13636  Ccbc 13665  Σcsu 15045
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2796  ax-rep 5193  ax-sep 5206  ax-nul 5213  ax-pow 5269  ax-pr 5333  ax-un 7464  ax-inf2 9107  ax-cnex 10596  ax-resscn 10597  ax-1cn 10598  ax-icn 10599  ax-addcl 10600  ax-addrcl 10601  ax-mulcl 10602  ax-mulrcl 10603  ax-mulcom 10604  ax-addass 10605  ax-mulass 10606  ax-distr 10607  ax-i2m1 10608  ax-1ne0 10609  ax-1rid 10610  ax-rnegex 10611  ax-rrecex 10612  ax-cnre 10613  ax-pre-lttri 10614  ax-pre-lttrn 10615  ax-pre-ltadd 10616  ax-pre-mulgt0 10617  ax-pre-sup 10618
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1539  df-fal 1549  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2803  df-cleq 2817  df-clel 2896  df-nfc 2966  df-ne 3020  df-nel 3127  df-ral 3146  df-rex 3147  df-reu 3148  df-rmo 3149  df-rab 3150  df-v 3499  df-sbc 3776  df-csb 3887  df-dif 3942  df-un 3944  df-in 3946  df-ss 3955  df-pss 3957  df-nul 4295  df-if 4471  df-pw 4544  df-sn 4571  df-pr 4573  df-tp 4575  df-op 4577  df-uni 4842  df-int 4880  df-iun 4924  df-br 5070  df-opab 5132  df-mpt 5150  df-tr 5176  df-id 5463  df-eprel 5468  df-po 5477  df-so 5478  df-fr 5517  df-se 5518  df-we 5519  df-xp 5564  df-rel 5565  df-cnv 5566  df-co 5567  df-dm 5568  df-rn 5569  df-res 5570  df-ima 5571  df-pred 6151  df-ord 6197  df-on 6198  df-lim 6199  df-suc 6200  df-iota 6317  df-fun 6360  df-fn 6361  df-f 6362  df-f1 6363  df-fo 6364  df-f1o 6365  df-fv 6366  df-isom 6367  df-riota 7117  df-ov 7162  df-oprab 7163  df-mpo 7164  df-om 7584  df-1st 7692  df-2nd 7693  df-wrecs 7950  df-recs 8011  df-rdg 8049  df-1o 8105  df-oadd 8109  df-er 8292  df-en 8513  df-dom 8514  df-sdom 8515  df-fin 8516  df-sup 8909  df-oi 8977  df-card 9371  df-pnf 10680  df-mnf 10681  df-xr 10682  df-ltxr 10683  df-le 10684  df-sub 10875  df-neg 10876  df-div 11301  df-nn 11642  df-2 11703  df-3 11704  df-n0 11901  df-z 11985  df-uz 12247  df-rp 12393  df-fz 12896  df-fzo 13037  df-seq 13373  df-exp 13433  df-fac 13637  df-bc 13666  df-hash 13694  df-cj 14461  df-re 14462  df-im 14463  df-sqrt 14597  df-abs 14598  df-clim 14848  df-sum 15046
This theorem is referenced by: (None)
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