Giuliano Lazzaroni, Piotr Wozniak, Caterina Ida Zeppieri
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Strong approximation of special functions of bounded variation functions with prescribed jump direction
In this note, we show that special functions of bounded variation ( functions with jump normal lying in a prescribed set of directions can be approximated by sequences of functions whose jump set is essentially closed, polyhedral, and preserves the orthogonality to , moreover the functions are smooth away from their jump set.
期刊介绍：
Mathematische Nachrichten - Mathematical News publishes original papers on new results and methods that hold prospect for substantial progress in mathematics and its applications. All branches of analysis, algebra, number theory, geometry and topology, flow mechanics and theoretical aspects of stochastics are given special emphasis. Mathematische Nachrichten is indexed/abstracted in Current Contents/Physical, Chemical and Earth Sciences; Mathematical Review; Zentralblatt für Mathematik; Math Database on STN International, INSPEC; Science Citation Index
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