5 papers
Optimal Hardy Inequalities for Random Walks on
Philipp Hake, Matthias Keller, Felix Pogorzelski
We prove an optimal Hardy inequality for every aperiodic, symmetric random walk in with finite variance. In particular, we verify null-criticality, and thus, optimal…
Supersolution Construction and Optimal Hardy Inequality for Fractional Laplacians
Philipp Hake, Matthias Keller, Felix Pogorzelski
We give a new criterion to show optimality of Hardy weights for general operators on graphs via the supersolution construction. For Laplacians on graphs without killing terms this…
A Liouville Theorem for Domains in Graphs
Philipp Hake, Matthias Keller, Felix Pogorzelski +1
We show a Liouville theorem for domains in graphs with Dirichlet boundary conditions. More specifically, we characterize the non-existence of non-zero bounded harmonic functions. S…
Positive Criticality and Optimal Hardy Inequality for Fractional Laplacians
Philipp Hake, Matthias Keller, Felix Pogorzelski
We characterize positive critical Hardy weights for general Laplacians on weighted graphs. We then apply this result to fractional Laplacians on general graphs and use the characte…
Optimal Hardy Inequality for Fractional Laplacians on the Lattice
Philipp Hake, Matthias Keller, Felix Pogorzelski
We study the fractional Hardy inequality on the integer lattice. We prove null-criticality of the Hardy weight and hence optimality of the constant. More specifically, we present a…