Zeta
 Usage
• Zeta[s] 给出 Riemann  函数  . • Zeta[s, a] 给出推广的 Riemann 函数  .
Notes
•  . •  , 其中去掉  的任何项。 • Zeta[s] 有一个不连续分支线。 • FullSimplify和FunctionExpand包括Zeta的变换规则。
 Further Examples
If the real part of s is greater than  , this sum is Zeta[s].
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Exact values can be calculated at the positive even integers.
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You can use FullSimplify and FunctionExpand to simplify some expressions involving the generalized Riemann zeta function.
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