Separation-free exponential fitting with structured noise, with applications to inverse problems in parabolic PDEs

Rami Katz, Dmitry Batenkov, Giulia Giordano

We investigate the recovery of exponents and amplitudes of an exponential sum, where the exponents ${\left\{{\lambda }_n\right\}}_{n=1}^{N_1}$ are the first $N_1$ eigenvalues of a Sturm-Liou…