dirichlet eta functionとは 意味・読み方・使い方

固有名詞

Dirichlet eta function

1. (mathematics, mathematical analysis) The alternating sum of the Dirichlet series expansion of the Riemann zeta function: ${\\displaystyle \\eta (s)=\\sum _{n=1}^{\\infty }{(-1)^{n-1} \\over n^{s}}={\\frac {1}{1^{s}}}-{\\frac {1}{2^{s}}}+{\\frac {1}{3^{s}}}-{\\frac {1}{4^{s}}}+\\cdots .}$