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# Mathematical Constants

 I Infinity Pi 3.14159 Degree /180: degrees to radians conversion factor GoldenRatio E e2.71828 EulerGamma Euler's constant 0.577216 Catalan Catalan's constant C0.915966 Khinchin Khinchin's constant K2.68545 Glaisher Glaisher's constant A1.28243

Mathematical constants.

Euler's constant EulerGamma is given by the limit . It appears in many integrals, and asymptotic formulas. It is sometimes known as the Euler-Mascheroni constant, and denoted C.
Catalan's constant Catalan is given by the sum (-1)k (2k+1)-2. It often appears in asymptotic estimates of combinatorial functions. It is variously denoted by C, K, or G.
Khinchin's constant Khinchin (sometimes called Khintchine's constant) is given by . It gives the geometric mean of the terms in the continued fraction representation for a typical real number.
Glaisher's constant Glaisher A (sometimes called the Glaisher-Kinkelin constant) satisfies , where is the Riemann zeta function. It appears in various sums and integrals, particularly those involving gamma and zeta functions.
Mathematical constants can be evaluated to arbitrary precision.
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Exact computations can also be done with them.
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