19/03/21 09:36:22.29 L2G86nzK.net
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つづき
In particular, Euler’s constant is transcendental.
A period is defined by Kontsevich and Zagier [186] to be a complex constant
whose real and imaginary parts separately are given as a finite sum of absolutely
convergent integrals of rational functions in any number of variables with rational
coefficients, integrated over a domain cut out by a finite set of polynomial equalities
and inequalities with rational coefficients; see Section 3.14.
(引用終り)
以上