Workshop dedicated to the memory of
Professor Gabriela Kohr
(5th Edition)



Geometric Function Theory in Several Complex Variables and Complex Banach Spaces




28 - 30 November 2025
Cluj-Napoca, Romania
(online, via Zoom - link will be sent by email)



The main contributions of Professor Gabriela Kohr refer to
  • Geometric function theory in several complex variables
    • Extensions of classical results in the theory of univalent functions to the case of several complex variables
    • Theory of Loewner chains of several complex variables
    • Theory of differential subordinations in ℂn
    • Approximation and control theory results for normalized biholomorphic mappings
    • Extension operators and quasiconformal mappings
  • Geometric function theory in complex Banach spaces
    • Theory of Loewner chains in complex Banach spaces
    • Estimation results for normalized biholomorphic mappings in complex Banach spaces
  • Complex analysis on bounded symmetric domains
    • Bloch mappings and related results on bounded symmetric domains
    • Harmonic and pluriharmonic mappings on complex Hilbert balls and bounded symmetric domains

Details about the entire scientific activity of Professor Gabriela Kohr can be found on the webpage:
http://math.ubbcluj.ro/~gkohr/

About the Workshop


The workshop is dedicated to the memory of Professor Gabriela Kohr, for her outstanding contributions in Geometric function theory in several complex variables and complex Banach spaces. The workshop particularly comprises
(but not only) the following topics:

  • Geometric function theory and applications
  • Loewner theory in one and higher dimensions
  • Univalent mappings in ℂn and complex Banach spaces
  • Quasiconformal mappings and applications
  • Complex Analysis in infinite dimensions
  • Complex Variables and Potential Theory
  • ...

_________________________________________________________________

Main organizer:

Professor Mirela Kohr, Faculty of Mathematics and Computer Science,
Babeş-Bolyai University, Cluj-Napoca, Romania


Organizing committee: Lecturer Mihai Iancu, Faculty of Mathematics and Computer Science,
Babeş-Bolyai University, Cluj-Napoca, Romania

Dr. Eduard Grigoriciuc, Faculty of Mathematics and Computer Science,
Babeş-Bolyai University, Cluj-Napoca, Romania

Lecturer Florin Albişoru, Faculty of Mathematics and Computer Science,
Babeş-Bolyai University, Cluj-Napoca, Romania

Invited Speakers


  • Leandro Arosio - Tor Vergata University, Rome, Italy
  • Zoltán Balogh - University of Bern, Switzerland
  • Lucian Beznea - Simion Stoilow Institute of Mathematics of the Romanian Academy and University POLITEHNICA Bucharest, Romania
  • Filippo Bracci - Tor Vergata University, Rome, Italy
  • Teodor Bulboacă - Babeș-Bolyai University, Cluj-Napoca, Romania
  • Cho-Ho Chu - Queen Mary, University of London, UK
  • Dan Coman - Syracuse University, New York, USA
  • Mihai Cristea - University of Bucharest, Romania
  • Paula Curt - Babeș-Bolyai University, Cluj-Napoca, Romania
  • Tamás Darvas - University of Maryland, USA
  • Mark Elin - Ort Braude College, Karmiel, Israel
  • Aurelian Gheondea - Simion Stoilow Institute of Mathematics of the Romanian Academy, Bucharest, Romania and Bilkent University, Ankara, Turkey
  • Anatoly Golberg - Holon Institute of Technology, Holon, Israel
  • Ian Graham - University of Toronto, Canada
  • Hidetaka Hamada - Kyushu Sangyo University, Fukuoka, Japan
  • Tatsuhiro Honda - Senshu University, Tokyo, Japan
  • Ikkei Hotta - Yamaguchi University, Ube, Japan
  • Mihai Iancu - Babeș-Bolyai University, Cluj-Napoca, Romania
  • Fiana Jacobzon - Braude College, Karmiel, Israel
  • Cezar Joiţa - Simion Stoilow Institute of Mathematics of the Romanian Academy, Bucharest, Romania
  • Massimo Lanza de Cristoforis - University of Padova, Italy
  • Sergey E. Mikhailov - Brunel University London, UK
  • Dorina Mitrea - Baylor University, Texas, USA
  • Irina Mitrea - Temple University, Philadelphia, USA
  • Marius Mitrea - Baylor University, Texas, USA
  • Camil Muscalu - Cornell University, Ithaca, NY, USA
  • Victor Nistor - Université de Lorraine, Metz, France
  • Mihai N. Pascu - Transilvania University of Braşov, Romania
  • Cornel Pintea - Babeș-Bolyai University, Cluj-Napoca, Romania
  • Radu Precup - Babeș-Bolyai University, Cluj-Napoca, Romania
  • Oliver Roth - University of Wuerzburg, Germany
  • Eric Schippers - University of Manitoba, Winnipeg, MB, Canada
  • David Shoikhet - HIT & Braude College, Israel
  • Toshiyuki Sugawa - Tohoku University, Sendai, Japan
  • Alexandru Tămăşan - University of Central Florida, FL, USA
  • Wolfgang L. Wendland - University of Stuttgart, Institute for Applied Analysis and Numerical Simulation & SIMTECH, Germany

Schedule

Book of abstracts


Important! Notice that the displayed hours are in accordance with the Romanian time (UTC+2).


Day 1 Day 2 Day 3


Romanian
Time
Day 1    (Friday, 28th of November)
Speaker Title of the talk
8:30 - 8:45 Mirela Kohr Opening Ceremony
8:50 - 9:35 Hidetaka Hamada Koebe one-quarter theorem on complex Banach spaces
9:40 - 10:25 Irina Mitrea On the Lack of Fredholm Solvability for the Lp Dirichlet Problem for Weakly Elliptic Systems in the Upper Half-Space
10:30 - 11:15 Filippo Bracci The Denjoy-Wolff Theorem in bounded convex domains
11:20 - 12:05 Oliver Roth A refinement of Jorgensen’s Theorem and the Gauss-Lucas-Thurston Theorem in hyperbolic geometry
12:10 - 12:55 Tatsuhiro Honda Bohr's inequalities on a complex Banach space
13:00 - 13:45 Zoltán Balogh Quantitative stability of extremal quasiconformal maps
13:50 - 14:35 David Shoikhet TBA
14:35 - 16:00 Break
16:00 - 16:45 Camil Muscalu Helicoidal Method - An Overview
16:50 - 17:35 Victor Nistor Operator theory for layer potentials: applications to the Stokes operator
17:40 - 18:25 Dorina Mitrea Classes of Singular Integral Operators and Applications to Boundary Value Problems
18:30 - 19:15 Marius Mitrea Geometric Estimates for Parabolic Singular Integral Operators
19:20 - 20:05 Massimo Lanza de Cristoforis Representation theorems for nonvariational solutions of the Helmholtz equation
20:10 - 20:55 Sergey Mikhailov On Spatially-Periodic Evolution Anisotropic Oseen Equations

Romanian
Time
Day 2    (Saturday, 29th of November)
Speaker Title of the talk
8:40 - 9:25 Toshiyuki Sugawa Nonlinear resolvents of a hohlomorphic semigroup on a unbounded domain
9:30 - 10:15 Wolfgang L. Wendland TBA
10:20 - 11:05 Radu Precup Navier-Stokes type models with control conditions given by inclusions
11:10 - 11:55 Lucian Beznea From harmonic spaces to infinite dimensional stochastic analysis
12:00 - 12:45 Cezar Joiţa Euclidean distance discriminants and Morse attractors
12:50 - 13:35 Aurelian Gheondea Strictly Inductive Systems of Measure Spaces
13:40 - 14:25 Mihai Pascu On the Bunkbed conjecture
14:30 - 16:00 Break
16:00 - 16:45 Cho-Ho Chu A Denjoy-Wolff theorem for bounded symmetric domains in Banach spaces
16:50 - 17:35 Dan Coman Tian’s theorem in singular settings
17:40 - 18:25 Tamás Darvas A YTD correspondence for constant scalar curvature metrics
18:30 - 19:15 Eric Schippers Overfare through curves in Riemann surfaces
19:20 - 20:05 Alexandru Tămășan On a boundary value problem for the Beltrami Equation

Photos




Professor Gabriela Kohr - lecture at the University of Toronto




Professor Gabriela Kohr in Japan


  

Gabriela Kohr in the campus of the University of Toronto


  

Gabriela Kohr in the campus of the University of Toronto




Gabriela Kohr in the office of Gabriela and Mirela Kohr




Gabriela and Mirela Kohr


More photos at Gabriela Kohr's webpage.

Contact


Mirela Kohr, main organizer

Faculty of Mathematics and Computer Science
Babeş-Bolyai University
1 M. Kogălniceanu Str.
400084 Cluj-Napoca, Romania

Email: mkohr@math.ubbcluj.ro
For technical problems, please contact

Mihai Iancu
Email: miancu@math.ubbcluj.ro

or

Eduard S. Grigoriciuc
Email: eduard.grigoriciuc@ubbcluj.ro
(Workshop webpage created by Eduard S. Grigoriciuc)