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math.AP2023
Diffusive Expansion For Neutron Transport Equation
Yan Guo, Lei Wu
Grazing set singularity leads to a surprising counter-example and breakdown of the classical mathematical theory for diffusive expansion of neutron transport equation…
math.AP2023
Ghost Effect from Boltzmann Theory: Expansion with Remainder
Raffaele Esposito, Yan Guo, Rossana Marra +1
Consider the limit of the steady Boltzmann problem \begin{align} v\cdot\nabla_x\mathfrak{F}=\varepsilon^{-1}Q[\mathfrak{F},\mathfrak{F}],\quad \mathfrak{F…