"Number Theory" のタグがついた記事

In mathematics, **1 − 2 + 3 − 4 + ···** is an infinite series whose terms are the successive positive integers, given alternating signs. Using sigma summation notation the sum of the first *m* terms of the series can be expressed as ${\displaystyle \sum _{n=1}^{m}n(-1)^{n-1}.}$