Talks at conferences:




















“Complexity Gaps of Turing Machines on infinite words”, International Conference:
Foundations Of Theoretical Computer Science, Kazan, Russia, June, 1987
“Teaching geometry through problems”, International Conference on Teaching High
School Geometry, Stockholm, Sweden, May 8, 1994.
"On teaching algorithmic methods to middle and high school students," International
Congress of Mathematicians, Zurich, Switzerland, August 1994
(by invitation only) ICMI Study: Perspectives of the Teaching Geometry for 21st
Century, Catania, Italy, September 1995.
Co-organizer, International Conference Teaching Mathematics for 21st Century, July 1-4,
1996, Riga, Latvia.
Fourth International Seminar: From Misconceptions to constructed understanding, June
13-15, 1997, Cornell University. Ithaca, NY, USA
Invited Plenary Address, 4th Annual New York Graduate Mathematics Education
Research Conference, Syracuse University, October 25, 1997.
(with D. W. Henderson and Colm Mulcahy) "Living geometry for liberal arts majors:
hands-on and discovery-based approaches", MathFest-97, Atlanta, Georgia, USA, 1997.
(by invitation only) ICMI Study: The Role of the History of mathematics in the teaching
and learning mathematics, Luminy (France), April 19-26, 1998
International conference of mathematics educators from Nordic countries Norma-98,
Kristiansand (Norway), June 5-9, 1998.
(by invitation only) ICMI Study: Teaching Mathematics at the Undergraduate Level,
Singapore, December 8-12, 1998.
“The Role of Physical Models in Teaching Geometry”, Mathematics Education
Contributed Paper Session at the AMS-MAA Joint Meeting, San Antonio, Texas,
January 13-16, 1999, USA
(by invitation only) “Mathematics in Latvia Through Centuries”, AMS Special Session on
The History of Mathematics, AMS-MAA Joint Meeting, Washington, DC, USA, January
19-22, 2000.
“History Makes Mathematics Alive”, Mathematics Education and History Contributed
Paper Session at the AMS-MAA Joint Meeting, Washington, DC, USA, January 19-22,
2000.
“The Role of Physical Models in Teaching Hyperbolic Geometry”, Janos Bolyai
Conference on Hyperbolic Geometry, Hungarian Academy of Sciences, Budapest,
Hungary, 8-12 July, 2002
Invited plenary address. “Mathematical Way of Thinking – When is it Creative?”
International Conference on Teaching Gifted Students and Increasing Creativity in
Mathematics Education, Riga, Latvia. July 15-18, 2002.
(by invitation only) “How it was to study and to teach mathematics in Cornell at the end
of 19th century?” AMS Special Session in History of Mathematics, Joint Mathematical
Meetings, January 18, 2003, Baltimore, MD.
(by invitation only) “Mathematical Aspects of Franz Reuleaux Kinematic Model
Collection”, AMS Special Session on History of Mathematics, AMS Sectional Meeting,
New York, April 13th, 2003.
“Using a Digital Kinematic Model Collection in the Classroom”, International
Conference: Scientific Instrument Collections in Universities, Dartmouth, NH, June 2629, 2004.
“History of Mathematics and Mechanics in Digital Reuleaux Kinematic Mechanism
Collection”, ICME-10, July 2004, Copenhagen, Denmark.




“Exploring the hyperbolic plane through crochet”, AMS Special Session on mathematics
and Mathematics Education in Fiber Arts, Joint Mathematical Meetings, Atlanta, GA,
January 2005.
“Exploring the hyperbolic plane through crochet”, Gathering for Gardner 7 (by
invitation), Atlanta, GA, March 2006.
“Exploring the hyperbolic plane through crochet”, Coxeter Symposium, Princeton
University, November 3, 2006.
(by invitation) "Geometry and motion links mathematics and engineering in collections
of 19th century kinematic models and their digital representation", ICMI Centennial
anniversary Symposium, Rome, Italy, March 5-8, 2008.
Workshop leader and presenter:















June 1998. (with D.W. Henderson) “Experiencing Geometry”, NORMA-98, Nordic
Mathematics Education Conference Proceedings, Kristiansand, Norway.
1996-97 academic year: (with A. Solomon and D. W. Henderson) Four one-day
workshops for school teachers, Cornell, Ithaca, NY
June, 1997. (with K. Gaddis, J.-J. Lo, A. Solomon, D. W. Henderson) week-long
National Science Foundation – Undergraduate Faculty Enhancement workshop, Teaching
Undergraduate Geometry, Cornell. Ithaca, NY.
June, 1997. (with A. Solomon and D. W. Henderson) Week-long workshop for school
teachers, Cornell, Ithaca, USA
1997-98 academic year: (with A. Solomon and D. W. Henderson) Four one-day
workshops for school teachers, Cornell, Ithaca, USA
June, 1999. (with K. Gaddis, J.-J. Lo, A. Solomon, and D. W. Henderson) week-long
National Science Foundation – Undergraduate Faculty Enhancement workshop, Teaching
Undergraduate Geometry, Cornell, Ithaca, NY.
June, 1999. (with A. Solomon and D. W. Henderson) Week-long workshop for teachers,
Cornell, Ithaca, USA.
1999-2000 academic year: (with A. Solomon and D. W. Henderson) Four one-day
workshops for school teachers, Cornell, Ithaca, USA.
June, 2000: (with K. Gaddis, J.-J. Lo, and D. W. Henderson) NSF-sponsored workshop,
Teaching Undergraduate Geometry, for mathematics professors at colleges and
universities.
November 21-22, December 6, December 19-20, 2000 and January 4, 2001: "Using
history of mathematics in everyday teaching" and "How to boost creativity of students in
math classes", Jurmala School District, Latvia: Liepaja Pedagogical Academy, Latvia;
Tartu University, Estonia; Gulbene School District, Latvia.
June 10-15, 2001. (with K. Gaddis, and D. W. Henderson) NSF-funded, MAA-sponsored
workshop, Teaching Undergraduate Geometry, for mathematics professors at colleges
and universities.
Fall 2001 (with Avery Solomon). Saturday workshops for teachers, Cornell University.
June 15-17, 2002 (with David Henderson) “Experiencing Geometry”, 2-hour workshop,
Canadian Mathematics Society Summer Meeting, Quebec City, Canada.
July 31, 2002, “Teaching Geometry with Proofs but No Axioms”, two 75 minute
workshops, Project NexT: Selected Topics in Undergraduate Mathematics Education,
Burlington, VT.
January 17, 2003. (with David Henderson) PREP Workshop Reunion. Joint Mathematics
Meetings, Baltimore, MD.









June 26-27, 2003. “Mathematical Aspects of Franz Reuleaux Kinematic Model
Collection and Connections with High School Mathematics”. NSF-supported workshop
for high school mathematics teachers, Ithaca, NY.
January 5-6, 2005. “What linkages have to do with mathematics”, 90 minute presentation
in The History of Mathematical Technologies: Exploring the Material Culture of
Mathematics, MAA Short Course at Joint Mathematics Meetings, Phoenix, AZ.
March 24, 2005. “Historical Nuggets in Mathematics” and “Mathematics in Kinematics
Models Collection”, workshops in Cornell Professional Development Day (for middle
and high school teachers).
June 13-14, 2005. (invited workshop leader) MAA and NSF sponsored workshop
“Preparing Mathematicians to Educate (elementary school) Teachers”, Kent State
University, OH.
August 5-6, 2005. (with David Henderson) MAA Mini-course: “Geometry with History
for Teaching Teachers”, Math Fest, Albuquerque, NM.
January 12-14, 2006. (with David Henderson) MAA Mini-course: “Geometry with
History for Teaching Teachers”, Joint Mathematics Meetings, San Antonio, TX.
January 7-8, 2007. (with David Henderson) MAA Mini-course: "Geometry with History
for Teaching Teachers", Joint Mathematics Meetings New Orleans, LI.
June 2007, three-day workshop in geometry for high school students, Algebra Project,
Miami, FL.
July 3, 2007, "Non-Euclidena Geometries" (with David W. Henderson), 3-hour
workshop, Teaching Day in Biannual Conference on Banach Algebras, Laval
University,Quebec, Canada.
Public lectures on mathematics, mathematics education, and art:














(with David Henderson) “Crocheting Hyperbolic Plane”, The Institute for Figuring,
Culver City, CA, May 27, 2004.
(with David Henderson) “Crocheting Hyperbolic Plane”, The Institute for Figuring and
Cabinet Magazine , The Kitchen, New York City, February 5, 2005.
(with Margaret Wertheim) workshop and talk “Crocheting the Hyperbolic Plane: A
Conversation on non-Euclidean geometry and feminine handicraft”, The Institute for
Figuring and Machine Project, Los Angeles, CA, August 7, 2005.
(with David Henderson) “Crocheting Hyperbolic Plane”, CUNY Graduate Center Science
and Art Series, September 22, 2005 (two talks).
“Creativity, Mathematics, Education”, Bard College Public Lecture Series (sponsored by
MAT Program), December 8, 2005.
“Crocheting Hyperbolic Plane”, University of Latvia, Riga, Latvia, March 1, 2006.
“From Math to Art”, public dialog with Bernar Venet, University of Connecticut, March
29, 2006.
“Crocheting Hyperbolic Plane”, Carleton College, May 18, 2006.
“Tactile ways of exploring non-Euclidean geometry”, talk in Textile Department, Cornell
University, September 1, 2006.
“Tactile ways of exploring non-Euclidean geometry”, 3-hour workshop, Department of
Architecture, Cornell University, October, 2006.
“Mysteries of the hyperbolic plane”, Science Cabaret, Ithaca, NY, October 2006.
“Mysteries of the hyperbolic plane”, University of Latvia, December 8, 2006.
“Mathematical Sculptures with Crochet”, Varna, NY, January 12, 2008
“USA education system and opportunities for international students”, Riga, Latvia,
February 13, 2008.












“Mysteries of the hyperbolic plane”, Kettle’s Yard, University of Cambridge, UK, April
12, 2008.
Panelist and speaker, Symposium “Arts and Crafts Saving the World”, Southbank Center,
London, UK, June 13, 2008.
“From Mathematics to Art”, invited talk, ISAMA conference, Albany, NY, USA, June
22, 2009..
“Adventures in non-Euclidean Geometry”, invited luncheon talk, 4th Annual NSF Robert
Noyce Scholarship Program Conference, Washington DC, July 6, 2009.
“Cels no matematikas uz makslu”, e-text-textiles residency, public talk, Riga, Latvia,
August 10, 2009.
“Crocheting Hyperbolic Plane”, Architecture Studio, Princeton University, October 1,
2009.
“Fiber Creations and the Mysteries of the Hyperbolic Plane”, public lecture, Concordia
University, Montreal, Canada, November 6, 2009.
“From Mathematics to Art”, public lecture, Science Gallery, Trinity College, Dublin,
Ireland, June 2, 2010.
“Folding Craft, Art, Mathematics: what happens in between?”, opening keynote, Textures
– conference of European Society for Arts, Science, and Literature, Riga, Latvia, June 15,
2010.
“Crocheting the Hyperbolic Plane”, public lecture, Fleisher Art Memorial, Philadelphia,
PA, USA, August 6, 2010.
“From Math to Art”, public talk, Lion Brand Yarn Studio, New York, NY, USA, August
12, 2010.
“From Mathematics to Art”, public lecture, Common Cod Fiber Guild, Boston, MA,
USA, September 10, 2010.