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SciCode / 10.5 / Write a Python function to evaluate the real-space summation as follows, where…

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Write a Python function to evaluate the real-space summation as follows, where `c_ij` is evaluated using `real_cij` function from .

\begin{align}
E_{\textrm{real-cross}} &= \sum_{i=1}^N \sum_{j>i}^N q_i q_j c_{ij}. \\
\end{align}

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Source and history

upstream_id / Original problem ID: 10.5
task_id: 3e787f7e-1eaf-5dc5-a678-bd30a6526335
task_key: dev--69e335f0-d1ca-5a82-bab6-b343e9761c03--10~2e5
task_revision_id: 2
config / split: / dev

Official source

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