The consecutive lifting-projection flow as an approximation of Boltzmann and Landau flow
This paper introduces the consecutive lifting-projection (LP) flow as a novel framework that approximates spatially homogeneous Boltzmann and Landau equations by lifting nonlinear collision operators to a higher-dimensional linear Kac master equation, thereby preserving physical conservation laws and entropy while enabling the development of new, stable, and accurate numerical solvers such as the Green's function method.