activity
19982026
most citedBoundary triplets and M-functions for non-selfadjoint operators, with applications to elliptic PDEs and block operator matrices

87 citations · 96 across the 15 of their papers we have counts for

collaborators
Showing 2026Show all

2 papers · 1 filter

math.SP2026

Essential spectral geometry of the Maxwell system in unbounded domains

Francesco Ferraresso, Marco Marletta

We analyse the essential spectrum of acting on divergence-free vector fields in unbounded domains of . We…

math.NA2026

No Spectral Invisibility for Dissipative Barrier Truncations in Any Dimension

Matthew J. Colbrook, Marco Marletta

The dissipative barrier method suppresses spectral pollution, but whether it can itself conceal genuine spectral points has remained open. Known as the graveyard problem in computa…