Home page of the research group of
Katarzyna and Franz-Viktor Kuhlmann

Institute of Mathematics,
University of Szczecin,
ul. Wielkopolska 15,
70-451 Szczecin,
Email: katarzyna.kuhlmann [at] usz.edu.pl,
fvk [at] usz.edu.pl, fvk [at] math.usask.ca

Our research interests: valuation theory, real algebra and ordered structures, model theoretic algebra;
in particular:

The Ph.D. students in our research group:

Hanna Ćmiel
Alessandro Linzi
Hanna Stojałowska (Hanna did her Masters degree on "Totally positive units of a real holomorphy ring" in 2019 with Katarzyna)
Piotr Szewczyk (Piotr did his Masters degree on the "Continuity of roots of polynomials over valued fields" in 2019 with FV)
Piotr Błaszkiewicz (Piotr did his Bachelor degree on "Algebraic Structures used for Quantifier Elimination in Valued Fields" in 2019, and his Masters degree on "Quantifier Elimination in valued fields with respect to the corresponding hyperfields" in 2021, both with FV)

Publications with participation of our Ph.D. students:

  1. Hanna Ćmiel, Alessandro Linzi, Piotr Szewczyk and Piotr Błaszkiewicz: Caristi-Kirk and Oettli-Théra ball spaces, and applications, J. Fixed Point Theory Appl. 21 (2019), no. 4, Paper No. 98
    (pdf file)
  2. Hanna Ćmiel, Franz-Viktor Kuhlmann and Katarzyna Kuhlmann: A generic approach to measuring the strength of completeness/compactness of various types of spaces and ordered structures, Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matemáticas 115, Article number: 156 (2021)
    (pdf file)
  3. Alessandro Linzi and Hanna Stojałowska: Hypervaluations on hyperfields and ordered canonical hypergroups, to appear in the Iranian journal of mathematical sciences and informatics
    (pdf file)
  4. Hanna Ćmiel, Franz-Viktor Kuhlmann and Piotr Szewczyk: On the continuity of roots of polynomials over valued fields, submitted
    (pdf file)
  5. Katarzyna Kuhlmann, Alessandro Linzi and Hanna Stojałowska: Orderings and valuations in hyperfields, submitted
    (pdf file)

Currently suggested topics for Master's and Ph.D. studies in our group:

Support for young mathematicians:

We are particularly active in the support of mathematicians early on in their career, giving advice on their research projects and articles in preparation. We invite them to visit us for these purposes at our Institute, and we organize conferences and workshops specially geared towards young mathematicians. Everyone who is interested in learning about our projects and areas of expertise is cordially invited to visit us or to contact us by email.

We support our students in building up connections with other researchers around the world, either by visiting them, or by inviting these researchers to visit us. Our students are actively participating in the conferences and workshops we organize, such as:

Workshop on "Valuations on Rational Function Fields"
organized by Franz-Viktor Kuhlmann and Katarzyna Kuhlmann
Institute of Mathematics, University of Szczecin, May 8-13, 2018

ALANT 5 - Joint Conferences on Algebra, Logic and Number Theory
12th Czech, Polish and Slovak Conference on Number Theory and 21st Colloquiumfest
Bedlewo (Poland), June 24-29, 2018

Graduate Students' Workshop
organized by Franz-Viktor Kuhlmann, Katarzyna Kuhlmann and Franciszek Prus-Wiśniowski
Institute of Mathematics, University of Szczecin, May 31 to June 3, 2019

Second Graduate Students' Workshop
organized by Franz-Viktor Kuhlmann and Franciszek Prus-Wiśniowski
Institute of Mathematics, University of Szczecin, March 24 and 25, 2022

We organized and led a working group on Fixed Point Theory for young mathematics students at a summer school of the Deutsche Studienstiftung, August 6-18, 2017. This resulted in a joint paper with one of the participants, M.~Paulsen.
Other papers written with mathematicians early in their career are:
joint paper with C. Visan,
joint paper with J. Dobrowolski,
joint paper with S. Durhan (formerly Azgin),
joint paper with S. Anscombe,
joint paper with I. Vlahu (former Masters student of FV),
joint paper with F. Sonaallah (former Masters student of FV and Katarzyna),
joint paper with K. Pal (former postdoctoral fellow of FV on a scholarship from PIMS),
joint paper with A. Naseem (former postdoctoral fellow of FV),
joint paper with J. Novacoski (former PhD student of FV),
joint paper with A. Dutta,
and quite a number of joint papers with FV's former PhD student Anna Blaszczok (see FV's list of papers).

International connections and collaborations:

We have connections to individual researchers and mathematical centers at the following universities:
Brazil: ICMC - USP Sao Carlos,
Czech Republic: Institute of Mathematics of the Czech Academy of Sciences,
France: Institut Mathématique de Jussieu - Paris Rive Gauche, Toulouse,
Germany: Münster, Dresden, Hochschule RheinMain,
Poland: University of Wroclaw, University of Silesia at Katowice,
USA: University of Missouri - Columbia, University of Pennsylvania, University of Hawaii, Graduate Center New York.

The Valuation Theory Home Page:

We are maintaining a web site that gives information on what is going on in valuation theory, announces conferences andcontains a preprint repository:

The Valuation Theory Home Page


We have organized and are organizing a number of conferences and workshops. Detailed information and links can be found on The Valuation Theory Home Page. Since the year 2000, FV has organized the Colloquiumfest, a small and mostly low budget conference, with various co-organizers. It also has taken place at various universities and venues: University of Saskatchewan, CUNY Graduate Center in New York, IHP Paris, Bogazici University in Istanbul, University of Valladolid, University of Central Lancashire, University of Szczecin, Federal University of São Carlos in Brazil, Institute of Mathematics of the Czech Academy of Sciences in Prague.
Would you like to co-organize a Colloquiumfest at your institution? Just contact us!

The Colloquiumfest Series

In the year 2010 the Colloquiumfest joined forces with the Czech, Polish and Slovak Conferences on Number Theory to form the biannual ALANT conferences.

Furthermore, FV initiated and co-organized two big international Valuation Theory Conference, each of which was followed by the publication of proceedings volumes. The third one is to follow in the next years - perhaps in Poland?

International Conference and Workshop on Valuation Theory,
Saskatoon, Canada, 1999

Second International Valuation Theory Conference,
Segovia, Spain, July 18 to 30, 2011

Katarzyna Kuhlmann's home page

Franz-Viktor Kuhlmann's home page

Music, movies, art and photography

Mathematical links

Last update: February 20, 2022