A dynamical low-rank integrator (XL/sXL) for the stiff Boltzmann equation evaluates the collision operator r^2 times per step and is asymptotic-preserving in the fluid limit.
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Asymptotic-Preserving Dynamical Low-Rank Method for the Stiff Nonlinear Boltzmann Equation
A dynamical low-rank integrator (XL/sXL) for the stiff Boltzmann equation evaluates the collision operator r^2 times per step and is asymptotic-preserving in the fluid limit.