Proceedings of the conference Contemporary Mathematics in Kielce 2020, February 24-27 2021.

• MitwirkendeR: Asuke, T.,; Banakh, T.,; Barańska, B.,; Barnsley, L. F.,; Barnsley, M. F.,; Ciesielski, K.,; Dzhamay, A.,; Fernandez-Martinez, M.,; Filipuk, G.,; Gryszka, K.,; Gutik, O.,; Horbaczewska, J.,; Insall, M.,; Kecker, T.,; Khylynsky, P.,; Leśniak, K.,; Ligęza, A.,; Lind, A.,; Luckhardt, D.,; Masternak, M.,; Nikitin, A.,; Pietiurenko, A.,; Popławski, M.,; Porten, E.,; Rovensky, V.,; Schiebold, C.,; Snigireva, N.,; Stokes, A.,; Strobin, F.,; Walczak, P.,; Zambrowska, M.,; Zullo, F.,
• Place / Publishing House: Warsaw ;, Berlin : : Sciendo, , [2021]; ©2021
• Year of Publication: 2021
• Edition: 1st ed.
• Language: English
• Physical Description: 1 online resource (297 p.)

The organizers of the conference Contemporary Mathematics in Kielce 2020 warmly welcome all the mathematicians interested in that field to participate in our meeting. The conference is hosted by the Jan Kochanowski University in Kielce, Poland, and takes place in the period from February 24-27, 2021, and will be held ONLINE, on the MS Teams platform. Our conference is held under the patronage of the President of the Jan Kochanowski University in Kielce. The main purpose of the conference is to stimulate the exchange of new ideas in algebra, topology and geometry, and to celebrate 50 years of the Jan Kochanowski University. On the occasion of the jubilee, we plan to remember the brightest moments of mathematical research and education in Kielce. The conference will be divided into two parts - the anniversary and the scientific. The first one gives the opportunity to meet many of the former and the current employees of our Institute. The second, provides the space for scientific discussions in thematic sessions, that will be Topology & Algebra, Analysis, Geometry and Didactics. Thanks to the support of the Minister of Science and the Higher Education grant No. DNK/SP/465255/2020, there is NO CONFERENCE FEE. We would like to ask all participants to follow the conference deadlines: • Registration: February 22, 2020 • Abstract submission: February 15, 2021 • Proceedings submission: April 31, 2021 The CMK2020 conference proceedings are planned to be published with De Gruyter Sciendo. The publication is supported by the Ministry of Science and Higher Education and is free of charge for authors. The expected publishing date is the third quarter of 2021. All paper are expected to have a DOI number, and the book will be ISBN registered We warmly invite all mathematicians to share our joy and scientific enthusiasm in these special days. Open Access Statement These conference proceedings are Open Access proceedings that allow a free unlimited access to all its contents without any restrictions upon publication to all users. Open Access License These conference proceedings provide immediate open access to its content under the Creative Commons BY-NC-ND 4.0. Authors who publish with these proceedings retain all copyrights and agree to the terms of the above-mentioned CC BY-NC-ND 4.0 license.

Table of Contents

Frontmatter -- PREFACE -- CONTENTS -- ON THE FUKS-LODDER-KOTSCHICK CLASS FOR DEFORMATIONS OF FOLIATIONS -- A POLISH GROUP CONTAINING A HAAR NULL Fα-SUBGROUP THAT CANNOT BE ENLARGED TO A HAAR NULL Gδ-SET -- TEACHERS' PERSPECTIVE ON THE ADVANTAGES AND DISADVANTAGES OF POSTGRADUATE STUDIES ALLOWING TO TEACH MATHEMATICS AS A SECOND SUBJECT -- CENTRAL OPEN SETS TILINGS -- ON SOME PARADOXES IN VOTING THEORY -- ON HAMILTONIANS RELATED TO THE SECOND PAINLEVÉ EQUATION -- MORAN TYPE THEOREMS AND IRREDUCIBLE FRACTAL STRUCTURES -- ON A REGULARISATION OF A NONLINEAR DIFFERENTIAL EQUATION RELATED TO THE NON-HOMOGENEOUS AIRY EQUATION -- A BRIEF PANORAMA OF PERIOD-LIKE MOTIONS IN DYNAMICAL SYSTEMS -- ON THE MONOID OF COFINITE PARTIAL ISOMETRIES OF N WITH A BOUNDED FINITE NOISE -- ON THE BEHAVIOR OF INTEGRABLE FUNCTIONS AT INFINITY -- NORMS ON CATEGORIES AND ANALOGS OF THE SCHRÖDER-BERNSTEIN THEOREM -- A FRACTAL TRIANGLE ARISING IN THE AIMD DYNAMICS -- DIRECTIONAL DENSITY OF POLYNOMIAL HULLS AT SINGULARITIES -- NEWTON DIAGRAMS AND THE GEOMETRIC DEGREE OF A POLYNOMIAL MAPPING OF C2 -- APPLICATION OF STOCHASTIC EQUATIONS UNDER NONCLASSICAL APPROXIMATION SCHEMES TO CONSTRUCTION AND ANALYSIS OF INFORMATION STRUGGLE MODEL -- SOLVING MATH PROBLEMS USING THE AREA METHOD -- THE BAIRE CATEGORY OF THE HYPERSPACE OF NONTRIVIAL CONVERGENT SEQUENCES -- ON A RIEMANNIAN MANIFOLD WITH TWO ORTHOGONAL DISTRIBUTIONS -- ON THE 2-SOLITON ASYMPTOTICS FOR THE d x d-MATRIX KORTEWEG-DE VRIES EQUATION -- CANAL SURFACES AND FOLIATIONS - A SURVEY