4 problems

Let $K=2,3,\dots$ and consider the initial-boundary value problem for a coupled subdiffusion system with $K$ components: … Assume $1\ge\alpha_1\ge\cdots\ge\alpha_K>0$, $\alpha_K<1$…

Consider the three-component coupled subdiffusion system in the case $v_0=w_0\equiv0$ and $u_0\not\equiv0$, with fractional orders $\alpha,\beta,\gamma$. In the numerical examples,…

Consider a coupled subdiffusion system with components having fractional derivative orders, and suppose some initial values may vanish identically. The lowest active fractional ord…

Subdiffusivity conjecture. Simple random walk on $G$ is subdiffusive.