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→Examples: This was incredibly stupidly placed punctuation. |
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:<math>\begin{align}
G_k\left(-\frac{1}{\tau}\right) &= \tau^k G_k(\tau), \\
G_k(\tau + 1) &= G_k(\tau).
\end{align}</math>
The condition {{math|''k'' > 2}} is needed for [[absolute convergence|convergence]]; for odd {{mvar|k}} there is cancellation between {{math|''λ''<sup>−''k''</sup>}} and {{math|(−''λ'')<sup>−''k''</sup>}}, so that such series are identically zero.
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