Researches in Mathematics

Bilichenko, R.O., Oles Honchar Dnipropetrovsk National University, Ukraine

• Vol 20 (2012) - Articles
  Approximation of unbounded functionals by the bounded ones in Hilbert space
  Abstract  PDF (Русский)
• Vol 24 (2016) - Articles
  Approximation of unbounded functional, defined by grades of normal operator, on the class of elements of Hilbert space
  Abstract  PDF (Русский)
• Vol 19 (2011) - Articles
  Inequality of Taikov type for powers of normal operators in Hilbert space
  Abstract  PDF (Русский)
• Vol 18 (2010) - Articles
  Some problems of approximation theory for powers of normal operators in Hilbert space
  Abstract  PDF (Русский)
• Vol 17 (2009) - Articles
  The best approximation of classes, defined by powers of self-adjoint operators acting in Hilbert space, by other classes
  Abstract  PDF (Русский)

Registered in

ISSN (Online): 2664-5009

ISSN (Print): 2664-4991