3 papers
math.GM2021
Cauchy-like Criterion for Differentiability of Functions of Several Variables
Yurii V. Mukhin, Nataliya D. Kundikova
In this paper, several differentiability criteria for real functions of multiple variables in n-dimensional Euclidean space are considered. Simple and easy-to-use Cauchy-like crite…
physics.ins-det2017
New ellipsometric approach for determining small light ellipticities
Nazar Al-wassiti, Evelina Bibikova, Nataliya Kundikova
We propose a precise ellipsometric method for the investigation of coherent light with a small ellipticity. The main feature of this method is the use of compensators with phase de…
physics.optics2012
Hollow chain-like beams
Dmitriy Cherepko, Nataliya Kundikova, Ivan Popkov
To generate hollow chain-like beams the diffraction of the first order Bessel beam by zone plate with two odd open Fresnel zone has been investigated. It has been shown that the ca…