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Piran
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Portorož
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Portorož
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Hotel Bernardin
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After almost 30 years of bringing researchers together once every three years with a recent "pandemic delay" the LAW'xx meetings are back again, hosted by the University of Primorska, and coorganized by the University of Ljubljanay and the Institute of Mathematics, Physics, and Mechanics (IMFM). The aim of this workshop is twofold, to mark the round anniversary of the founder of these gatherings Heydar Radjavi and to restart them again.
Scientific Committee
 Dijana Ilišević, University of Zagreb, Croatia
 ChiKwong Li, William & Mary, Williamsburg, Virginia, United States of America
 Raphael Loewy, Technion  Israel Institute of Technology, Haifa, Israel
 Mitja Mastnak (Chair), Saint Mary's University, Halifax, Canada
 Martin Mathieu, Queen's University Belfast, United Kingdom
 João Filipe Queiró, University of Coimbra, Portugal
 Konrad Schmüdgen, University of Leipzig, Germany
Organizing Committee
 Ljiljana Arambašić, University of Zagreb, Croatia
 Bojan Kuzma (Local Organizer), University of Primorska, Slovenia
 Matjaž Omladič (Chair), University of Ljubljana, Slovenia
 Nik Stopar, University of Ljubljana, Slovenia
 Aljaž Zalar, University of Ljubljana, Slovenia
Confirmed Invited Speakers
 Jane Breen, Ontario Tech University, Canada
 Doug Farenick, University of Regina, Canada
 João Gouveia, University of Coimbra, Portugal
 Laurent Marcoux, University of Waterloo, Canada
 Lajos Molnár, University of Szeged and University of Budapest, Hungary
 Clément de Seguins Pazzis, Université de Versailles SaintQuentinenYvelines, France
 Helena Šmigoc, University College Dublin, Ireland
 Ryotaro Tanaka, Tokyo University of Science, Japan
Young researcher sections
Short presentations by Ph.D. students or postdocs are welcome as usually at LAW'xx meetings.
Working groups
Much of math research is done discussing open problems. We always do that but not at conferences, at least not officially. At LAW'xx gatherings we do. Thus, the number of published papers written or at least started at these meetings is greater than the number of meetings itself. Here are two prearranged working groups for this time.
Local to global properties of collections of matrices (lead by Mitja Mastnak and Heydar Radjavi). We are interested in the following question about a collection of nbyn matrices: if it satisfies some interesting local property, does this imply some significant global property? For example: if for all A,B in an irreducible semigroup we have that the spectrum of ABBA is real, then the semigroup is simultaneously similar to a semigroup of real matrices. The aim of this working group is to study some open problems in the area and perhaps also come up with new open problems.
Moment problems and positive polynomials (lead by Aljaž Zalar). Given a (finite or infinite) sequence of numbers indexed by monomials and a closed set X, the moment problem (MP) asks to characterize criteria for the existence of a Borel measure on X such that its moments coincide with the given sequence. Duality with positive polynomials has led to many new results in MPs. The aim of this working group is to discuss open problems in this area.
Deadlines
Extended abstracts of contributions whether general or "young" should be submitted before November 30^{th} to get reviewed on time.
Geography
After LAW'xx meetings have been changing locations in Slovenia, a seaside area was chosen this time, a former Venetian saltharvesting "colony", where people are still SloveneItalian bilingual. It includes saltpans at Sečovlje (Sicciole), the touristy place Portorož (Portorose) in the middle, and an ancient salt exporting portfortress Piran (Pirano).

