Collision Operator
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Description

References
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[*] R. Hager, E.S. Yoon, S. Ku et al., J. Comp. Physics, 315, 644 (2016), `https://doi.org/10.1016/j.jcp.2016.03.064 <https://doi.org/10.1016/j.jcp.2016.03.064>`_

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