Ralph Freese
Ralph Freese
Department of Mathematics
University of Hawaii
Honolulu, HI 96822
Email: ralph (at) math (dot) hawaii (dot) edu
Volumes II and III of ALVIN are now available!!!
UACalc and other Software
 Universal Algebra Calculator:
This free program is capable of doing numerous things in Universal Algebra.
including lattice drawing, Maltsev conditions, etc. It has its own website:
 Lattice Drawing Program:
I have a java component for drawing lattices and ordered sets. There
are some demos and sample applictions.
Publications
Conferences and Seminar Talks:
 My talk at BLAST2024, UNT, Denton,
April 4, 2024. Slides 14 and 15 give diagrams showing
how to construct the Haiman lattices used to prove nonfinite basis results.

My talk on
New Old
Results. Slides, video and abstract available at
this (Panglobal Seminar) site.

My talk with Ralph McKenzie, George McNulty and Walter Taylor on
Algebras
Lattices Varieties, Volumes 1N.
Slides, video and abstract available at
this (Panglobal Seminar) site.
 My talk on Linear Mal'tsev Conditions.
Video available at
La
Trobe GAIA Seminar Page,
Sept 24/25, 2020.
 My talk on embedding
modular lattices in congruence lattices,
JMM2020, Jan 13, 2020.
 My talk on Representations of
Lattices as Congruence Lattices of Finite Algebras,
at BLAST 2017, Vanderbilt University Aug 1418, 2017.
 UACalc file with algebras whose
congruence lattices have at most 7 elments.
 My talk on Projective
Lattices, with applications to isotone maps and databases,
at CLA 2013, La Rochelle, France Oct 1518, 2013.
 My talk on the use
and implementation of the Universal Algebra Calculator,
at the first Conference/Workshop on Computational
Universal Algebra, University of Louisville, Oct 4, 2013.
 My talk on Maltsev products
of congruence permutable varieties,
at the Louisville AMS Meeting, Oct 56, 2013.
 My talk on Maltsev Conditions,
at the Lattice Theory and Universal Algebra Meeting
honoring Bela Csakany, Szeged, June 2126, 2012.
 My talk on semidistributivity
and npermutability,
at the Honolulu AMS Meeting, Mar 34, 2012.
 My talk on Algorithm and
the Universal Algebra Calculator,
at the
JardaFest Meeting, Jun 2125, 2010.
 My talk on Maltsev Conditions
(joint with Matt Valeriote)
at the Nashville Conference June 1116, 2007.
 My talk on Congruence Varieties
at the Gratzer Schmidt 70th Birthday Party,
Budapest, June 69, 2006.
 My talk on
computing TCT types in \( O(n^3) \) time,
at the Universal Algebra and Lattice Theory Congerence,
Szeged, July 48, 2005.
General Algebra and Lattice Theory Homepages
Classes
Previous Classes