We investigate the validity of the Phragmèn-Lindelöf principle for a class of elliptic equations with a potential, posed on infinite graphs. Consequently, we get uniqueness, in the class of solutions satisfying a suitable growth condition at infinity. We suppose that the outer degree (or outer curvature) of the graph is bounded from above, and we allow the potential to go to zero at infinity in a controlled way. Finally, we discuss the optimality of the conditions on the potential and on the outer degree on special graphs.

Phragmèn-Lindelöf Type Theorems for Elliptic Equations on Infinite Graphs

Biagi S.;Punzo F.
2026-01-01

Abstract

We investigate the validity of the Phragmèn-Lindelöf principle for a class of elliptic equations with a potential, posed on infinite graphs. Consequently, we get uniqueness, in the class of solutions satisfying a suitable growth condition at infinity. We suppose that the outer degree (or outer curvature) of the graph is bounded from above, and we allow the potential to go to zero at infinity in a controlled way. Finally, we discuss the optimality of the conditions on the potential and on the outer degree on special graphs.
2026
Comparison principle
Graphs
Laplace operator on graphs
Phragmèn-Lindelöf
Sub–supersolutions
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1305028
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