17 citations · 29 across the 10 of their papers we have counts for
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math.SP2015★ 8 cited
Analysis of the essential spectrum of singular matrix differential operators
Orif O. Ibrogimov, Petr Siegl, Christiane Tretter
A complete analysis of the essential spectrum of matrix-differential operators of the form \begin{align} \begin{pmatrix} -\displaystyle{\frac{\rm d}{\rm d t}} p \displ…
math.CA2015
Functional Equations and the Cauchy Mean Value Theorem
Zoltan M. Balogh, Orif O. Ibrogimov, Boris S. Mityagin
The aim of this note is to characterize all pairs of sufficiently smooth functions for which the mean value in the Cauchy Mean Value Theorem is taken at a point which has a well-de…