19/04/27 18:07:13.56 VJaCQacd.net
>>107 補足
"period "
この"period "は、Periodic functionの period みたいだね
URLﾘﾝｸ(en.wikipedia.org)
Periodic function
URLﾘﾝｸ(en.wikipedia.org)
Ring of periods
(抜粋)
In mathematics, a period is a number that can be expressed as an integral of an algebraic function over an algebraic domain. Sums and products of periods remain periods, so the periods form a ring.
Maxim Kontsevich and Don Zagier (2001) gave a survey of periods and introduced some conjectures about them.