Професор Лотар Рајхел (http://www.math.kent.edu/~reichel/ ) са Универзитета Кент Стејт ће одржати предавање у уторак, 26.11.2019. у 15 часова у учионици број 3. Наслов и апстракт предавања су испод овог параграфа. Сви заинтересовани су добродошли.
Title: Linearized Krylov subspace Bregman iteration with nonnegativity constraint
Speaker: Lothar Reichel
Affiliation: Department of Mathematical Sciences, Kent State University, Kent, OH 44242
Abstract: Bregman-type iterative methods have attracted considerable attention
in recent years due to their ease of implementation and the high quality of the
computed solutions they deliver. However, these iterative methods may require a
large number of iterations and this reduces their attractiveness. This talk
describes a linearized Bregman algorithm defined by projecting the problem to
be solved into an appropriately chosen low-dimensional Krylov subspace. The
projection reduces both the number of iterations and the computational effort
required for each iteration. A variant of this solution method, in which
nonnegativity of each computed iterate is imposed, also is described. The talk
presents joint work with A. Buccini and M. Pasha.