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math.SP2025
An enhanced term in the SzegÅ-type asymptotics for the free massless Dirac operator
Leon Bollmann
We consider a regularised Fermi projection of the Hamiltonian of the massless Dirac equation at Fermi energy zero. The matrix-valued symbol of the resulting operator is discontinuo…
math.SP2025
The Widom-Sobolev formula for discontinuous matrix-valued symbols
Leon Bollmann, Peter Müller
We prove the Widom-Sobolev formula for the asymptotic behaviour of truncated Wiener-Hopf operators with discontinuous matrix-valued symbols for three different classes of test func…