Welcome, dear reader, to

The Valuation Theory Home Page

This home page is intended to be a forum for all mathematicians who work in valuation theory or apply valuation theoretical results in their own field of research. The home page offers:

If you have suggestions, questions, ideas, news, or if you want your name and address on the above mentioned list, or if you have a recent paper in or applying valuation theory, then write to

fvk [at] math.usask.ca


With great sadness we have to inform you of the death of our colleague, collaborator and dear friend Murray Marshall. He suffered a heart attack on Wednesday, April 29, from which he did not recover. Murray passed away on Friday, May 1, 2015. He was 75 years old, but still very active in research and the supervision of graduate students until the end.

A short obituary together with information about the funeral on Tuesday, May 5, can be found here. And here you can find Murray's own web site.

In the year 2000 we honored Murray on occasion of his 60th birthday with a small conference which we called "Colloquiumfest". There were many limericks about Murray created on the occasion of the conference; they provide wonderful portraits of the great mathematician and friend we have now lost. This conference was the start of the Colloquiumfest series. It is very unfortunate that we were not able anymore to celebrate Murray's 75th birthday with a Colloquiumfest.

If anyone would like to write something about Murray, describing his mathematical work or sharing personal anecdotes, please send it to us and we will put it on the Valuation Theory Home Page. Here is a web page with the first contributions:

In Memoriam Murray Marshall

Two sessions in two different international conferences this summer have been dedicated to Murray's memory in recognition of his fundamental contributions to subjects such as Positive Polynomials, Sums of Squares and Moment Problems. See
IWOTA 2015, Tbilisi (Georgia), July 6-12, 2015
Moment Problems and Applications - Minisymposium at DMV2015, Hamburg (Germany), September 24-28, 2015

Proceedings of the 2nd International Valuation Theory Conference published

In September of 2014, the Proceedings

Valuation Theory and its Interactions

of the

Segovia, Spain, July 18 to 29, 2011

were published. Click here for:
the publisher's web page,
a picture of the cover.

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Bibliometry, open access journals, article processing charges
Thispage provides links, background information and discussion about bibliometry and open access journals. Please send any contributions you may want to make.

Upcoming special events:

Workshop: O-Minimality and Applications
organized by David Masser, Patrick Speissegger and Margaret Thomas
University of Konstanz (Germany), July 20-23, 2015

The sixteenth Colloquiumfest
A meeting of students and colleagues of Peter Roquette
organized by Franz-Viktor Kuhlmann, Florian Pop and Alexander Schmidt
University of Heidelberg (Germany), July 24 and 25, 2015

Ordered Algebraic Structures and Related Topics
organized by Fabrizio Broglia, Francoise Delon, Max Dickmann and Danielle Gondard
CIRM, Luminy (France), October 12-16, 2015

Special Session on Advances in Valuation Theory
at the AMS Fall Eastern Sectional Meeting
organized by Samar ElHitti, Franz-Viktor Kuhlmann and Hans Schoutens
Rutgers University, New Brunswick, NJ (USA), November 14-15, 2015

Past special events:

The Colloquiumfest Series

Singular Landscapes
In honor of Bernard Teissier's 70th birthday
organized by Patrick Popescu-Pampu, Pedro Gonzalez Perez, Evelia Garcia Barroso and Charles Favre
Centre Paul-Langevin AUSSOIS, June 22-26, 2015

Mini-workshop: Interactions between Algebra and Functional Analysis
Institute of Mathematics, Academy of Sciences of the Czech Republic, Prague, December 17-21, 2014

Valuation Theory and Its Applications (Oberwolfach Workshop 1444)
organized by Zoe Chatzidakis, Jochen Koenigsmann, Franz-Viktor Kuhlmann and Florian Pop
Oberwolfach (Germany), Oct. 26 - Nov. 1, 2014

Joint Meeting of the Polish Mathematical Society and the German Mathematical Society
Session on General forms of self-similarity in algebra and topology
organized by Christoph Bandt, Franz-Viktor Kuhlmann, Katarzyna Kuhlmann and Tomasz Szarek
Poznan (Poland), Sept. 17 - 20, 2014

13th International Conference on p-adic Functional Analysis
Paderborn (Germany), August 12-16, 2014

29th Summer Conference on Topology and its Applications
College of Staten Island, City University of New York (USA), July 23-26, 2014

ALANT 3 - Joint Conferences on Algebra, Logic and Number Theory
10th Czech, Polish and Slovak Conference on Number Theory and 15th Colloquiumfest
June 8-13, 2014Bedlewo (Poland), June 8-13, 2014

Summer School Around Valuation Theory
Sirince (Turkey), May 22-26, 2014

Workshop on Fractal Structures, Ultrametrics and Ordered Fields
organized by Wieslaw Kubis, Franz-Viktor Kuhlmann and Jerzy Kakol
Cieszyn (Poland), April 17-20, 2013

Conference in honour of Shreeram S. Abhyankar
on occasion of his 82nd birthday
Purdue University, July 5-8, 2012

Joint Conferences on Algebra, Logic And Number Theory - ALANT 2
12th Colloquiumfest and
9th Czech, Polish and Slovak Conference on Number Theory
Beskydy Mountains, Czech Republic, June 11-14, 2012.

Emphasis Year on Valuation Theory,
University of Saskatchewan, September 2011 to April 2012

Segovia, Spain, July 18 to 29, 2011

Workshop on Valuation Theory in Positive Characteristic,
Mathematics Village, Sirince, Turkey
June 15 to 19, 2011

Workshop on Valuation Theory in Positive Characteristic
University of Katowice, Poland, June 25 to July 3, 2010

Joint Conferences on Algebra, Logic And Number Theory
9th Colloquiumfest and
8th Czech, Polish and Slovak Conference on Number Theory
Bukowina Tatrzanska, Poland, June 21-24, 2010

Mini-workshop on new perspectives in Valuation theory
The Fields Institute, Toronto
March 23-25, 2009

Mini-workshop on Differential Kaplansky Theory
The Fields Institute, Toronto
April 3-4, 2009

In memoriam Otto Endler
Campinas - March, 21-24, 2006

Saskatoon, July/August 1999
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Last update: July 3, 2015 --------- created and maintained by Franz-Viktor Kuhlmann