Due to their extraordinary utility and broad applicability in many areas of classical
mathematics and modern physical sciences (most notably, computerized tomography) …

Iterative methods for finding fixed points of non-expansive operators in Hilbert spaces have
been described in many publications. In this monograph we try to present the methods in a …

Gridless direction of arrival (DOA) estimation is addressed for a 1-D non-uniform array
(NUA) of arbitrary geometry. Currently, gridless DOA estimation is solved via convex …

We report on progress in algorithms for iterative phase retrieval. The theory of convex
optimization is used to develop and to gain insight into counterparts for the nonconvex …

The phase retrieval problem is of paramount importance in various areas of applied physics
and engineering. The state of the art for solving this problem in two dimensions relies …

Variational arguments are classical techniques whose use can be traced back to the early
development of the calculus of variations and further. Rooted in the physical principle of …