2 problems

Consider a linear population model with two structuring variables and its finite-dimensional pseudospectral approximation. Let an eigenfunction of the model have a given regularity…

Let $\alpha\in(0,1)$, let $\mathcal D^\alpha$ be the left-sided fractional derivative on $\mathbb R$ defined by … and let $[\partial_x\mathcal D^\alpha]^m u$ denote the composite-m…