STEFFEN LEMPP
Office Address
Department of
Mathematics
University of Wisconsin
480 Lincoln Drive
Madison,
WI 53706-1325
USA
Email/Skype/Phone/Fax
Email: @math.wisc.edu">lemppmath.wisc.edu
Skype: steffen.lempp
Office phone: +1-608-263-1975
Department phone: +1-608-263-3053
Fax: +1-608-263-8891
(Please note that I do not regularly monitor the answering
machine of my office phone, so if you want to reach me quickly, email works
best.)
Office and office hours during semester
Office: 525 Van Vleck Hall
Office hours: virtual only until further notice,
Monday/Wednesday 1:20-2:10 during semester, or by appointment.
(Email me
(@math.wisc.edu">lemppmath.wisc.edu)
to request a Google meet.
You will need only a browser open, and I will send you a link to log in.)
Note to current and prospective graduate students
Since I will retire in December 2024, I will not take on new graduate students
starting in summer 2023 (except as co-advisor).
I encourage any student interested in logic to contact
my
wonderful colleagues in logic.
Conferences I plan to attend
- March 25-29, 2023:
ASL
North American Meeting, University of California-Irvine
- July 10-14, 2023:
16th International
Conference on Computability, Complexity and Randomness (CCR),
Lake Kochel, Germany
- July 24-28, 2023:
CiE 2023
(Computability in Europe), Batumi State University, Georgia (hybrid,
see Call
for Papers)
- September-December 2023:
sabbatical semester at Technical University of Vienna, Austria
Online logic seminars worldwide
- Computability Theory and Applications Online Seminar
(organized by Vasco Brattka, Damir Dzhafarov, Katia Fokina, Noam Greenberg,
Takayuki Kihara, Ludovic Patey, Arno Pauly and Linda Westrick,
requires one-time on-line registration, with many recordings on
youtube channel)
- Logic Seminars
(list of research seminars in sciences created by Edgar Costa and David
Roe; you can filter for math and then logic)
- Logic Supergroup (alliance of around 20 logic groups
worldwide, requires registration with organizers)
- Logicians
in Quarantine (organized by Bruno Lopes and Petrucio Viana,
Universidade Federal Fluminense, Rio de Janeiro, Brazil; site is in
Portuguese, and times listed are local to Brazil, but titles (and talks)
are often in English, and links to talks are provided)
- Online Logic Seminar (join here, organized by Wesley Calvert,
Southern Illinois University, Carbondale; no registration needed)
- Online seminars
and talks in Logic (list maintained by Miguel Moreno, University of Vienna)
Other conferences of interest to logicians
- April 15-16, 2023:
23rd
Graduate Student Conference in Logic (GSCL XXIII), University of
Illinois-Chicago
- May 19-21, 2023:
Computability
and Combinatorics 2023, University of Connecticut-Storrs
- May 23-26, 2023:
Mid-Atlantic Mathematical Logic Seminar (MAMLS 2023),
Rutgers University, New Brunswick, Ner Jersey
- May 24-25, 2023:
Iowa Colloquium on
Information, Complexity, and Logic (ICICL), Drake University,
Des Moines, Iowa
- June 5-9, 2023:
European
Logic Colloquium 2023, University of Milan, Italy
- June 12-July 7, 2023:
Workshop "From omega to Omega", National University of
Singapore
Web pages from past conferences and special sessions I have
co-organized
My primary research interest is computability in its various aspects,
both in classical computability theory, in particular degree structures,
and in applications of computability to model theory,
algebra, proof theory, and computer science.
Some particular problems I have been working on, or would be interested in
working on again, include
- algebraic structures of, and decidability of fragments of theories of,
degree structures (esp. the c.e. Turing degrees, the d.c.e. and n-c.e.
Turing degrees, the global enumeration degrees and the
Σ02-enumeration
degrees),
- computable numberings of families of sets, esp. finite families of c.e.
sets,
- c.e. and other equivalence relations and their structure,
- computable algebraic structures, such as linear orders, Boolean
algebras, and groups,
- characterization of computable algebraic structures by classical
invariants (e.g., Ketonen invariants and Ulm invariants),
- degrees of models of א1-categorical
theories, and more generally of trivial theories of finite Morley rank,
- proof-theoretical strength of combinatorial principles related to
Ramsey's Theorem for pairs, and
- equivalence of Martin-Löf randomness with other notions of randomness
(in particular Kolmogorov-Loveland randomness).
My curriculum vitae, bibliography, and mathematical genealogy
My publications on line
In March 2015, I became one of the editors for this journal established by the
Russian Academy of Sciences and Kazan State University and distributed by
Springer-Verlag.
Submissions in mathematical logic, especially in computability theory and its
applications, can be sent directly to me by email at
@math.wisc.edu">lemppmath.wisc.edu.
Before submission, be sure to consult the
instructions on how to prepare your manuscript.
- AMS 2020 Mathematics Subject
Classifications
- arXiv.org in
logic (open-access database of papers in math and science, maintained
by Cornell University)
- Bibliography of
General Theory of Computability (maintained by Igor A. Lavrov,
contains also many papers in Russian)
- Bibliography on Boolean algebras (maintained by
Don
Monk, University of Colorado)
- computability.org
(online resource for computability theorists maintained by
Damir Dzhafarov,
University of Connecticut-Storrs)
- The Computability Menagerie (a diagram of known
implications and non-implications about degree classes, maintained by
Joe Miller)
- Computability theory (list server maintained by
Bjørn Kjos-Hanssen, University of
Hawai'i-Mānoa)
- Computer
Science Bibliography (maintained by the
University of Trier,
Germany)
- European Mathematical Information
Service (EMIS) (a central portal for electronic math resources in
Europe)
- Forking and
Dividing: Map of the Universe
(maintained by Gabe Conant)
- FRG: Collaborative
Research: Computability Theoretic Aspects of Combinatorics
- Göttinger DigitalisierungsZentrum (GDZ)
(an open-access database of many resources in mathematics, mainly
from German-speaking and Eastern European countries, maintained by the
University of
Göttingen, e.g.,
Algebra and Logic (in Russian))
- JSTOR (Journal Storage,
maintained by the Carnegie Mellon Foundation, requires subscription by
your institution, or
ASL membership)
- Lattice
Drawing (maintained by
Ralph
Freese, University of Hawai'i-Mānoa)
- Logic Mailing List (maintained by the
Bonn
Mathematical Logic Group)
- Math-Net.Ru: All-Russian Mathematical Portal (maintained
by Steklov Mathematical
Institute of the Russian Academy of Sciences)
- Math journal price surveys (maintained by
Ulf Rehmann, Bielefeld, Germany)
- Mathematical
Logic around the world (maintained by
Martin Goldstern, Technical University of Vienna, Austria)
- Mathematics
Genealogy Project (maintained by North Dakota State University)
- Mathematics on the Web (including foreign-language mathematical dictionaries, maintained by
the AMS)
- Mathoverflow in logic (a place for mathematicians to
ask and answer questions)
- Open Logic
Project (an open source logic text in adjustable modules, with some
prebuilt versions (instigated by Richard Zach)
- Project Euclid (a
non-profit journal database maintained by Cornell University and primarily
funded by the Mellon Foundation)
- Proof Theory Blog
- Research groups in logic and theoretical computer science
(maintained by Anton Setzer, Swansea, Wales)
- Shelah
Archive (maintained by Technical University of Vienna, Austria)
- zbMATH (Zentralblatt search
for math papers;free access starting January 1, 2021!)
- Zoo
Viewer (non-implications in various arease of computability theory,
maintained by Damir Dzhafarov and Ludovic Patey)
Information on special Ph. D. and Master's Programs in Logic
- Master of Logic,
University of Amsterdam, The Netherlands
- Master in Pure and
Applied Logic, University of Barcelona, Spain
- Ph.D. in Logic and the
Methodology of Science, University of California-Berkeley
- Master's in Logic
and Theory of Science, Eötvös University, Budapest, Hungary
- Pure and Applied Logic (PAL)
program, Carnegie Mellon University, Pittsburgh, Pennsylvania
- Ph.D. in Logic and the Foundations of Mathematics,
University of Notre Dame, Indiana
- Master in Logic and Philosophy of Science, Ludwig-Maximilian
University of Munich, Germany
- University of Wisconsin-Madison ("special committee degree"
information for "build-your-own-PhD program" information, e.g., in "logic")
Summer Schools in Logic for Undergraduate and Graduate Students
Our committee invites suggestions for books, monographs, and papers
to be translated into and from English.
The criteria for translation are high quality of material presented,
lack of an equivalent text in the language to be translated into, and
marketability of the translated text. We invite especially submissions
from authors and from the advisors of theses.
If you are an author of a book that will appear soon (as a new book or in a
revised edition), we encourage you to discuss with your publisher the option
of retaining the copyright for your book in translation into other languages!
This is best done before you sign the final contract.
Of course, it is up to you, but you should keep this option in mind.
Please send your suggestions to one of the committee members:
Andrés
Villaveces (Universidad Nacional de Colombia, Bogotá, Colombia),
Zhaokuan Hao (Fudan University, Shanghai, China),
Iskander
Kalimullin (Kazan Federal University, Russia),
Hiroakira
Ono (Japan Advanced Institute of Science and Technology (JAIST), Ishikawa,
Japan),
Todor Tsankov
(University of Lyon 1, France), or me
(@math.wisc.edu">lemppmath.wisc.edu).
The ASL Committee on Translations offers a Russian
translation of Bruno Poizat's
"Cours de théorie des modèles"
("A Course in Model Theory") for
free download.
I also administer the program of the
Association for Symbolic Logic (ASL) offering
free subscriptions to
the Journal of Symbolic Logic and the
Bulletin of Symbolic Logic
to university libraries
in the former Warsaw Pact countries
which are on the
World Bank List of developing economies.
For more information about this program, click here
for information in English or in
Russian.
(If the family name of a person is ambiguous (in my humble opinion), then
it is listed below in all capital letters.)
- Uri
Andrews, University of Wisconsin-Madison
- Andy Arana, University of Lorraine, Nancy and Paris.
France
- Marat Arslanov, Kazan Federal University, Russia
- Matthias Aschenbrenner, University of Vienna, Austria
- Jeremy Avigad,
Carnegie Mellon University
- Serikzhan Badaev,
Kazakh National University, Almaty
- John Baldwin,
University of Illinois-Chicago
- George Barmpalias,
Chinese Academy of Sciences, Beijing, China
- Kolya Bazhenov,
Sobolev Institute of Mathematics, Novosibirsk, Russia
- Verónica Becher, University of Buenos Aires,
Argentina
- Itaï
BEN YAACOV, University of Lyon, France
- Michael Benedikt, Oxford University, England
- Laurent Bienvenu, University of Bordeaux, France
- Steve
Binns, King Fahd University of Petroleum and Minerals, Dhahran,
Saudi Arabia
- Vasco Brattka,
University of the Army, Munich, Germany
- Katie
Brodhead, Florida State University, Panama City
- Jin-Yi Cai, University
of Wisconsin-Madison
- Wesley Calvert, Southern Illinois University, Carbondale
- Doug Cenzer,
University of Florida, Gainesville
- Artem
Chernikov, University of Los Angeles-California
- Peter Cholak,
University of Notre Dame
- Chi Tat
Chong, National University of Singapore
- Chris Conidis, City University of New York-College of
Staten Island
- Barbara Csima,
University of Waterloo, Ontario, Canada
- Arman
Darbinyan, Texas A&M University, College Station, Texas
- Natasha Dobrinen, University of Notre Dame, Indiana
- Rod
Downey, Victoria University of Wellington, New Zealand
- Damir
Dzhafarov, University of Connecticut-Storrs
- Marat
Faizrahmanov, Kazan Federal University, Russia
- Katia Fokina,
Vienna University of Technology, Austria
- Johanna Franklin, Hofstra University, Hempstead, New York
- Jim
Freitag, University of Illinois-Chicago
- Harvey Friedman, Ohio State University, Columbus
- Sy David
Friedman, Kurt Gödel Research Center for Mathematical Logic
(KGRC), Vienna, Austria
- Andrey
Frolov, Kazan Federal University, Russia
- Hristo
Ganchev, Sofia University, Bulgaria
- Su GAO, Nankai University, Tianjin, China
- Peter Gerdes, Indiana
University, Bloomington
- Jun Le GOH,
National University of Singapore
- Isaac
Goldbring, University of California-Irvine
- Sergey Goncharov, Siberian Branch of the Russian Academy
of Sciences and Novosibirsk State University, Russia
- Noam
Greenberg, Victoria University of Wellington, New Zealand
- Valentina
Harizanov, George Washington University, Washington, D.C.
- Matthew
Harrison-Trainor, University of Michigan, Ann Arbor
- Denis
Hirschfeldt, University of Chicago, Illinois
- Jeff Hirst,
Appalachian State University, Boone, North Carolina
- Meng-Che
("Turbo") Ho, Claifornia State University, Northridge
- Steve Jackson,
University of North Texas, Denton
- Carl Jockusch,
University of Illinois at Urbana-Champaign
- Asher Kach,
Google-Chicago
- Iskander
Kalimullin, Kazan Federal University, Russia
- Jerry Keisler,
University of Wisconsin-Madison
- Bakhadyr
Khoussainov, University of Auckland, New Zealand and
University of Electronic
Science and Technology of China, Chengdu, China
- Takayuki
Kihara, Nagoya University, Japan
- Byunghan Kim, Yonsei University, Seoul, South Korea
- Bjørn
Kjos-Hanssen, University of Hawai'i-Mānoa
- Ulrich Kohlenbach, University of Darmstadt, Germany
- Leszek
Kołodziejczyk, University of Warsaw, Poland
- Chris Laskowski,
University of Maryland-College Park
- Andy Lewis-Pye, London School of Economics, England
- Jack Lutz,
Iowa State University, Ames
- Maryanthe
Malliaris, University of Chicago, Illinois
- Alberto
Marcone, University of Udine, Italy
- Dave
Marker, University of Illinois-Chicago
- Andrew Marks,
University of California-Los Angeles
- Tim
McNicholl, Iowa State University, Ames
- Sasha Mel'nikov, Victoria University of Wellington,
New Zealand
- Joe
Mileti, Grinnell College, Grinnell, Iowa
- Arnie Miller,
University of Wisconsin-Madison
- Joe
Miller, University of Wisconsin-Madison
- Russell
Miller, Queens College, New York City
- Benoît
Monin, University of Paris-Est Créteil, France
- Antonio
Montalbán, University of California-Berkeley
- Andrey Morozov,
Novosibirsk State University and Russian Academy of Sciences, Russia
- Carl
Mummert, Marshall University, Huntington, West Virginia
- Manat Mustafa, Nazarbayev University, Nur-Sultan, Kazakhstan
- Ronnie Nagloo, University of Illinois-Chicago
- Satya
Nandakumar, Indian Institute of Technology, Kanpur
- Keng Meng (Selwyn)
NG, Nanyang Technological University, Singapore
- André
Nies, University of Auckland, New Zealand
- Ludovic Patey,
University of Paris Diderot, France
- Arno
Pauly, University of Swansea, Wales
- Misha Peretyat'kin,
Institute of Mathematics, Almaty, Kazakhstan
- Anand
Pillay, University of Notre Dame, Indiana
- Dilip
Raghavan, National University of Singapore
- Jan Reimann,
Pennsylvania State University, University Park
- Christian Rosendal, University of Maryland, College Park
- Wim
Ruitenburg, Marquette University, Milwaukee, Wisconsin
- Luca SAN MAURO,
Technical University of Vienna, Austria
- Andre Scedrov,
University of Pennsylvania, Philadephia
- Noah
Schweber, Proof School, San Franscisco, California
- Paul
Shafer, University of Leeds, England
- Sasha
Shlapentokh, East Carolina University, Greenville, North Carolina
- Richard Shore,
Cornell University, Ithaca, New York
- Steve Simpson,
Pennsylvania State University, State College and Vanderbilt University,
Nashville, Tennessee
- Ted Slaman,
University of California-Berkeley
- Bob Soare,
University of Chicago, Illinois
- Reed Solomon,
University of Connecticut-Storrs
- Andrea Sorbi,
University of Siena, Italy
- Mariya
Soskova, University of Wisconsin-Madison
- Patrick
Speissegger, McMaster University, Hamilton, Ontario, Canada
- Frank Stephan, National University of Singapore
- Bas
Terwijn, Radboud University Nijmegen, The Netherlands
- Henry
Towsner, University of Pennsylvania, Philadelphia
- Todor Tsankov,
University of Lyon 1, France
- Anush
Tserunyan, McGill University, Montreal, Canada
- Dan Turetsky, Victoria University of Wellington, New Zealand
- Manlio Valenti,
University of Wisconsin-Madison
- Lou
van den Dries, University of Illinois at Champaign-Urbana
- Dieter van
Melkebeek, University of Wisconsin-Madison
- Peter Vranas, University of Wisconsin-Madison
- Wei WANG, Sun Yat-sen University, Guangzhou, China
- Andreas
Weiermann, Ghent University, Belgium
- Linda
Westrick, Pennsylvania State University
- Alex
Wilkie, University of Oxford, England
- Guohua
Wu, Nanyang Technological University, Singapore
- Mars
Yamaleev, Kazan Federal University
- Yue
YANG, National University of Singapore
- Keita Yokoyama, Tohoku University, Sendai, Japan
- Liang YU,
Nanjing University, China
- Ning ZHONG,
University of Cincinnati, Ohio
- Boris
Zil'ber, University of Oxford, England
- Andy Zucker,
University of Waterloo, Ontario, Canada
Prepared by Steffen Lempp
(@math.wisc.edu">lemppmath.wisc.edu)