BOLYAI INSTITUTE |
Aradi vértanúk tere 1.
H-6720 Szeged, Hungary Tel/Fax: (36) 62 544 548 |
Colloquium on Semigroups
Szeged, 17-21 July, 2000
PROGRAM
19.00--22.00 | Welcome party and registration in the Central Building of the
University of Szeged (Dugonics tér 13.) |
Monday (17 July)
10.00--10.15 | Opening of the Colloquium |
10.20--11.10 | Donald B. McAlister
Inverse Semigroups with a Compatible Semilattice Ordering |
Coffee break | |
11.40--12.00 | Goncalo Pinto
On Ordered Completely Simple Semigroups |
12.05--12.25 | Martin Kuril
Varieties of Semilattice-Ordered Semigroups |
12.30--12.50 | Libor Polak
On Pseudovarieties of Semilattice-Ordered Semigroups and Monoids |
Lunch break | |
15.00--15.50 | Benjamin Steinberg
Categories as Algebra II |
16.00--16.20 | Karl Auinger
A Syntactic Approach to Covers of E-dense Semigroups |
Coffee break | |
16.50--17.10 | Janusz Konieczny
The Semigroup Generated by Regular Boolean Matrices |
17.15--17.35 | Marin Gutan
Groups of Permutation Identities for Some Classes of Semigroups |
17.40--18.00 | Attila Nagy
Regular ${\cal RGC}_n$-commutative semigroups |
Tuesday (18 July)
9.00--9.20 | Zarko Popovic
Regularity and Archimedeaness of Semidirect Products of Semigroups |
9.25--9.45 | Melanija Mitrovic
On $\pi$-semisimple and Left Quasi-$\pi$-regular Semigroups |
9.50--10.10 | Miroslav Ciric
Regularity Equations and Conditions on Semigroups |
10.15--10.35 | Bernd Billhardt
Embedding Locally Inverse Semigroups into Rees Matrix Semigroups |
Coffee break | |
11.05--11.55 | Winfried Bruns
Normality and Covering Properties of Affine Semigroups |
12.05--12.25 | Ngo Viet Trung
Ring Theoretic Properties of Affine Semigroups |
12.30--12.50 | Klaus Denecke
All Solid Varieties of Semirings |
Lunch break | |
15.00--15.50 | Pierre A. Grillet
Commutative Semigroup Cohomology |
16.00--16.20 | Boris V. Novikov
On Cohomological Dimension of Ideals of Free Semigroups |
Coffee break | |
16.50--17.10 | Vitaly Usenko
The Semigroup Complexes and the Endomorphism Semigroups |
17.15--17.35 | Peeter Puusemp
Some Embedding Theorems for Groups |
Wednesday (19 July)
9.00--9.20 | Wit Forys
Asymptotic Behaviour of Bi-infinite Words |
9.25--9.45 | Jelena Kovacevic
Semigroup Theoretical Methods in Automata Theory |
9.50--10.10 | Tatjana Petkovic
Variable Varieties of Semigroups |
10.15--10.35 | Jorge Almeida
Tameness of the Pseudovariety R |
Coffee break | |
11.05--11.55 | Boris M. Schein
A New Construction for Free Inverse Semigroups |
12.05--12.25 | Igor Dolinka
Some Results on the Lattice of Varieties of Involution Semigroups |
12.30--12.50 | Akihiro Yamamura
A Class of Inverse Monoids Acting on Ordered Forests |
Lunch break | |
15.00--18.30 | Sightseeing tour |
Thursday (20 July)
9.00--9.20
|
Predrag V. Krtolica
An Implementation of Unary Pairfunctions Using the Reverse Polish Notation |
9.25--9.45 | Aleksandar Stamenkovic
Primitive Idempotents in Semigroups |
9.50--10.10 | Ondrej Klima
Complexity of Unification and Matching Problems in the Varieties of Bands |
10.15--10.35 | Michal Kunc
Weak Codings of Trace Monoids |
Coffee break | |
11.05--11.55
|
John Rhodes
Techniques in my Proof that Complexity is Decidable Finite Automata and Semigroups |
12.05--12.25 | Chrystopher L. Nehaniv
"Genius Jumps" in the Complexity of Finite Semigroups |
12.30--12.50 | Arseny M. Shur
Syntactic Semigroups of Languages Closed Under Factors |
Lunch break | |
15.00--17.30 | Problem session |
Jorge Almeida: Some Key Problems on Finite Semigroups Mikhail V. Volkov: Selected Problems in the Theory of Semigroup Varieteies (the finite basis problem for finite semigroups, and the decision problem for some free and pseudofree semigroups) Maria B. Szendrei: Some Open Problems in the Structure Theory of Regular Semigroups Winfried Bruns - Ngo Viet Trung: Some Open Problems on Affine Semigroups |
|
19.00--22.00 | Reception |
9.30--9.50 | Pal Domosi
Irreducibility in Equal Length for Finite Semigroups |
9.55--10.15 | Sinisa Crvenkovic
Free Spectra and $p_n$-sequences of Semigroups |
10.20--10.40 | Mikhail V. Volkov
The Finite Basis Problem for Semigroups of Orientation Preserving Transformations |
Coffee break | |
11.10--12.00 | Boris M. Vernikov
The Lattice of Nilsemigroup Varieties |