Preprint
Aug 2026
On the stability of eigenvalues of varying bilinear forms in abstract Hilbertian settings and applications
The aim of the present paper is to develop a spectral perturbation theory from a higher perspective. More precisely, we consider a one-parameter family of varying bilinear forms, each of them defined on a (possibly) different Hilbert space. Assuming the stability of the corresponding spectra, our first main result esta...
Andrea Bisterzo, R. Ognibene, Prasun Roychowdhury et al.
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