AMS Sectional Meeting Program by Special Session
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1998 Spring Southeastern Sectional Meeting
Louisville, KY, March 2021, 1998
Meeting #931
Associate secretaries:
Robert J Daverman, AMS
daverman@math.utk.edu
Special Session on Semigroups, Algorithms, and Universal Algebra

Friday March 20, 1998, 8:00 a.m.10:50 a.m.
Special Session on Semigroups, Algorithms, and Universal Algebra, I
Room 158, Burhans Hall
Organizers:
Ralph N. McKenzie, Vanderbilt University mckenzie@math.vanderbilt.edu
Steven Seif, University of Louisville swseif01@ulkyvx.louisville.edu

8:00 a.m.
Globals of groupless groupoids.
Kevin Blount*, Vanderbilt University
Ralph McKenzie, Vanderbilt University
(93120331)

8:30 a.m.
Injective Completeness of Certain Categories of Commutative Regular Semigroups.
Yefim Katsov*, Hanover College
(93120115)

9:00 a.m.
Varieties with few fintely generated algebras.
Joel Berman*, University of Illinois at Chicago
Pawe\l M. Idziak, Jagiellonian University
(93108107)

9:30 a.m.
Second Centralizers of Transformations.
Janusz Konieczny*, Mary Washington College
(9312042)

10:00 a.m.
The residual character of minimal varieties of type 5 .
Agnes Szendrei*, J\'ozsef Attila University
(93108251)

10:30 a.m.
Bad threeelement algebras.
George F. McNulty*, University of South Carolina
Ross Willard, University of Waterloo
(93108301)

Friday March 20, 1998, 2:45 p.m.6:35 p.m.
Special Session on Semigroups, Algorithms, and Universal Algebra, II
Room 158, Burhans Hall
Organizers:
Ralph N. McKenzie, Vanderbilt University mckenzie@math.vanderbilt.edu
Steven Seif, University of Louisville swseif01@ulkyvx.louisville.edu

2:45 p.m.
The variety generated by tournaments.
Jaroslav Jezek, Charles University
Petar Markovic, Vanderbilt University
Miklos Maroti*, Vanderbilt University
Ralph McKenzie, Vanderbilt University
(93108323)

3:15 p.m.
Residually Small Equational Classes.
Matt Valeriote*, Mathematics Department
(93108226)

3:45 p.m.
A new construction for free inverse semigroups.
Olga V. Poliakova, University of Arkansas
Boris M. Schein*, University of Arkansas
(93120179)

4:15 p.m.
An Equational Characterization of Residuated Lattices that are Subdirect Products of Chains.
Constantine Tsinakis*, Vanderbilt University
(93106254)

4:45 p.m.
The Classification of Commutative Minimal Clones.
Keith A. Kearnes*, University of Louisville
Agnes Szendrei, Bolyai Institute
(93108284)

5:15 p.m.
Complexity problems for matrix rings, matrix semigroups and Rees matrix semigroups.
Steve Seif, University of Louisville
Csaba Szab\'o*, McMaster University
(93108223)

5:45 p.m.
Fregean Logics and Fregean Quasivarieties.
Don L. Pigozzi*, Iowa State University
Janusz Czelakowski, Opole University
(93108206)

6:15 p.m.
Decidability Results for Finite Semigroups.
Mark Sapir*, Vanderbilt University
(93120250)

Saturday March 21, 1998, 8:00 a.m.10:50 a.m.
Special Session on Semigroups, Algorithms, and Universal Algebra, III
Room 158, Burhans Hall
Organizers:
Ralph N. McKenzie, Vanderbilt University mckenzie@math.vanderbilt.edu
Steven Seif, University of Louisville swseif01@ulkyvx.louisville.edu

8:00 a.m.
Calculating conjugates in finite transformation semigroups.
Robert B. McFadden*, University of Louisville
(93120304)

9:00 a.m.
Variations on the theme of semidirect products of regular semigroups.
Peter R Jones*, Marquette University
(93120298)

9:30 a.m.
The restricted Quackenbush conjecture.
R. Willard*, University of Waterloo
Keith Kearnes, University of Louisville
(93108225)

10:00 a.m.
Circuits over algebras and complexity classes of parallel computations .
Joel VanderWerf*, Neologic Systems
(93108324)

10:30 a.m.
Finite bases for graph Malgebras.
Dejan Deli\'{c}*, Department of Pure Mathematics
(93108227)

Saturday March 21, 1998, 2:45 p.m.6:35 p.m.
Special Session on Semigroups, Algorithms, and Universal Algebra, IV
Room 158, Burhans Hall
Organizers:
Ralph N. McKenzie, Vanderbilt University mckenzie@math.vanderbilt.edu
Steven Seif, University of Louisville swseif01@ulkyvx.louisville.edu

2:45 p.m.
Homotopy and semisymmetry.
Jonathan D. H. Smith*, Iowa State University
(93120229)

3:15 p.m.
Posets whose monoids of orderpreserving maps are abundant.
M. E. Adams*, State University of New York at New Paltz
Matthew Gould, Vanderbilt University
(93106245)

3:45 p.m.
Categorical Equivalence of Modes.
Clifford H Bergman*, Iowa State University
Joel Berman, University of Illinois at Chicago
(93118138)

4:15 p.m.
Priestley Duality for Distributive and Brouwerian Semilattices.
Jonathan D Farley*, Vanderbilt University
(93108329)

4:45 p.m.
Transformation semigroups and associated permutation groups.
Inessa Levi*, University of Louisville
(93120249)

5:15 p.m.
Discussion

5:45 p.m.
Lattices with large minimal extensions.
Ralph Freese, University of Hawaii
Jaroslav Jezek, Charles University (Prague)
J. B. Nation*, University of Hawaii
(93106341)

6:15 p.m.
Unsolved and unsolvable problems in finite algebras and semigroups.
Ralph McKenzie*, Vanderbilt University
(93108302)
Inquiries: meet@ams.org