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Fungrim entry: 220e8d

3π2=limN1N2n=1Nφ(n)\frac{3}{{\pi}^{2}} = \lim_{N \to \infty} \frac{1}{{N}^{2}} \sum_{n=1}^{N} \varphi(n)
TeX:
\frac{3}{{\pi}^{2}} = \lim_{N \to \infty} \frac{1}{{N}^{2}} \sum_{n=1}^{N} \varphi(n)
Definitions:
Fungrim symbol Notation Short description
Powab{a}^{b} Power
Piπ\pi The constant pi (3.14...)
SequenceLimitlimnaf(n)\lim_{n \to a} f(n) Limiting value of sequence
Sumnf(n)\sum_{n} f(n) Sum
Totientφ(n)\varphi(n) Euler totient function
Infinity\infty Positive infinity
Source code for this entry:
Entry(ID("220e8d"),
    Formula(Equal(Div(3, Pow(Pi, 2)), SequenceLimit(Mul(Div(1, Pow(N, 2)), Sum(Totient(n), For(n, 1, N))), For(N, Infinity)))))

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Copyright (C) Fredrik Johansson and contributors. Fungrim is provided under the MIT license. The source code is on GitHub.

2020-08-27 09:56:25.682319 UTC