We devise efficient methods for dynamic inverse problems, where both the quantities of interest and forward operator (measurement process) may change in time. Our goal is to solve all simultaneously. consider large-scale ill-posed problems made more challenging by their nature and, possibly, limited amount available data per measurement step. To alleviate these difficulties, we apply a unified ...

The Hardy-Littlewood majorant problem has a positive answer only for exponents p which are even integers, while there are counterexamples for all p / ∈ 2N. Montgomery conjectured that there exist counterexamples even among idempotent polynomials. This was proved recently by Mockenhaupt and Schlag with some four-term idempotents. However, Mockenhaupt conjectured that even the classical 1 + e ± e...