• ``Subdivision Atlases for Non-Euclideans Spaces'',
  • 3rd SIAM Conference on Applied Algebraic Geometry,
    Mini-Symposium on Verified Solutions of Algebraic Systems,
    NIMS, Daejeon, South Korea, August 3-7, 2015.

• `` Root Finding for Analytic and Harmonic Functions'',
  • 3rd SIAM Conference on Applied Algebraic Geometry,
    Mini-Symposium on Algorithms and Complexity in Polynomial System Solving,
    NIMS, Daejeon, South Korea, August 3-7, 2015.

• ``Soft Subdivision Search and Motion Planning: Axiomatics'',
  • Department of Computer Science, Rutgers University, April 15, 2015.

• ``Soft Subdivision Search and Motion Planning: Axiomatics'',
  • (Invited plenary speaker) Frontiers of Algorithms Workshop (FAW),
    Guilin, China (July 3-5, 2015)

• ``Resolution-Exact Algorithms for Link Robots'',
  • 11th Workshop on Algorithmic Foundations of Robotics (WAFR).
    3-5 Aug 2014, Bogazici University, Istanbul, Turkey.

• ``Towards Numerical Computational Geometry'',
  • Beihang University, Beijing, China. July 30, 2014.

• ``Analytic Root Isolation'',
  • Chinese Academy of Sciences, Beijing, China. July 31, 2014.

• ``Isotopic Arrangement of Curves: an Exact Numerical Approach'',
  • 4th Intl.~Congress on Mathematical Software (ICMS),
    5-9 Aug 2014, Seoul, Korea.

• ``Towards Numerical Computational Geometry'',
  • Max-Planck Institute of Computer Science,
    Saarbruecken, Germany. July 25, 2013.

• ``Analytic Root Clusters''
  • Invited Talk, Special Session on Computational Complexity in the Continuous World,
    Computability in Europe (CiE 2013), Milan, Italy. Jul 1-5, 2013.

• ``Soft Subdivision Search and Motion Planning''
  • Robotics Challenge and Vision Workshop (RCV 2013),
    in Robotics Science and Systems (RSS 2013), Berlin, Germany. June 27, 2013.
    Best Paper Award, sponsored by Computing Community Consortium (CCC).

• ``On Soft Predicates in Subdivision Motion Planning''
  • (with C.Wang and Y.-J. Chiang), 29th SoCG,
    Rio de Janeiro, Brazil. June 17-20, 2013.

• ``Beyond Exact Geometric Computation'',
  • Invited talk, Geometric Computing Challenges Workshop (GCC).
    Part of Geometry Week 2013, Rio de Janeiro, Brazil. Jun 17-20, 2013.

• ``Recent Results on Exact Root Isolation and their Complexity''
  • Math Colloquium, Department of Applied and Computational Mathematics and Statistics,
    Notre Dame University. April 21, 2013.

• ``Theory of Soft Subdivision Search and Motion Planning''
  • (with C. Wang and Y.-J. Chiang) Laboratoire d'Informatique de Paris 6,
    INRIA/University Pierre and Marie Curie, Paris. Oct 25, 2012.

• ``Non-local Isotopic Approximation of Nonsingular Surfaces''
  • (with Long Lin, Jihun Yu) Symposium on Solid and Physical Modeling (SPM'12),
    University of Burgundy, Dijon. Oct 29-31, 2012

• ``Near Optimal Tree Size Bounds on a Simple Real Root Isolation Algorithm''
  • (with Vikram Sharma), 37th ISSAC, Grenoble, France. July 22-25, 2012.

• GAIA Lecture Series
  (Center for Geometry and its Applications)
  1. ``Towards Exact Numerical Voronoi Diagrams'' (July 6)
  2. ``Pi=3.14... is in Log Space'' (July 13)
  3. ``Motion Planning and Theory of Soft Subdivision Search'' (July 21)
POSTECH, Korea. July 2012.
[GAIA Poster]

• ``Towards Exact Numerical Voronoi Diagrams''
  • (Main Plenary Talk, with V.Sharma and J.-M.Lien)
    9th Intl. Symp. on Voronoi Diagrams in Science and Engineering (ISVD 2012), Rutgers, New Jersey. June 27-29, 2012.

• ``A Simple but Exact and Efficient Algorithm for Complex Root Isolation and its Complexity Analysis''
  • (with Michael Sagraloff) 36th ISSAC, San Jose, California. June 8-11, 2011.

• ``Empirical Study of an Evaluation-Based Subdivision Algorithm for Complex Root Isolation''
  • (with Narayan Kamath and Irina Voiculescu)
    4th Int'l Workshop on Symbolic Numeric Computation, Jun 7-9, 2011. San Jose, California.

• ``Cxyz: Isotopic Subdivision Algorithms for Non-Singular Surfaces''
  • Dagstuhl Seminar, Computational Geometry. Mar 13-18, 2011.

• ``Exact Geometric Computation and Beyond''
  • Oxford University Computing Laboratory, Oct 20, 2009.

• Tutorial: ``Symbolic Computation and Computational Geometry'' [talk 1] [talk 2] [talk 3] [3-in-1]
  • at 34th ISSAC, Seoul, Korea. Aug 28-31, 2009.

• ``Isotopic Meshing of Algebraic Curves''
  • Postech, Seoul, Korea. Jul 13, 2009.

• ``Geometry as a Clue to Computing'' [talk]
  • cSplash, A Courant Math-Science Event for High School Students, Apr 4, 2009.

• ``Theory of Correct Rounding'' [talk]
  • Invited talk, 3rd WALCOM (Third Annual Workshop on Algorithm and Computation)
  • Indian Statistical Institute (ISI), Kolkata, India. Feb 18-20, 2009.

• ``What is the Numerical Halting Problem?'' [talk]
  • cSplash, A Courant Math-Science Event for High School Students, Mar 29, 2008.

• ``Integral Analysis of Adaptive Algorithms: Real Root Isolation'' [abstract]
  • NYU CS Theory Seminar, Jan 24, 2008, 2:15-3:15pm, WWH 1314.

• ``Subdivision Algorithms and Integral Analysis'' [abstract] [talk]
  • Invited talk, 2nd MACIS (Int'l Conf. on Math. Aspects of Computer and Info. Sci.)
  • Paris, France, Dec 5-7, 2007.

• ``Complete Adaptive Algorithms for Curves and their Analysis'',
  • Invited talk, ACS workshop on Robust Shape Operations
  • INRIA Sophia-Antipolis, Sep 26-28, 2007.

• ``Zero Problems in Theory and Applications''
  • Opening talk, Zero 2007 (Workshop on the Zero Problem: Theory and Applications)
  • Korea Institute of Advanced Study (KIAS), Jul 19-21, 2007.

• ``Theory of Real Approximation and Exact Geometric Computation'' [ talk]
  • Distinguished Lecture
  • Computer Science Department, Drexel University, April 19, 2007.

• ``Is It Really Zero?'' [ abstract] [ talk]
  • Middlebury College, Vermont. April 6, 2007.

• ``Complexity of Real Approximation: Brent Revisited'' [ abstract] [ talk]
  • Workshop in celebration of Richard Brent's 60th Birthday:
    ``Computing by the Numbers: Algorithms, Precision, and Complexity''.
  • Weierstrass Institute for Applied Analysis and Stochastics, Berlin. July 20-21, 2006.
• ``New Bounds in the Analysis of Subdivision Algorithms for Real Root Isolation '' [ abstract] [ talk]
  • Invited talk, General Workshop of ACS Project, Athens, Greece. May 8-11, 2006.
  • Also presented at Math Dept, North Carolina State University, Oct 25, 2006.
• ``Theory of Real Computation According to EGC'' [ abstract] [ talk]
  • Dagstuhl Seminar 06021 on
    `Reliable Implementation of Real Number Algorithms: Theory and Practice'
  • January 8-13, 2006.
• ``Seven Lectures on Robust Geometric Computation'' [Seven Lectures on Exact Computation Lectures]
  • KAIST/JAIST SIGTCS Summer School on Algorithms
  • August 8-11, 2005.

Aug 8-12, 2005:

``Exact and Algebraic Computation'',
KAIST-JAIST Summer School on Algorithms
(Organizers: Otfried Cheong and Tetsuo Asano)

Jul 29, 2004:

``Shortest Path Amidst Discs is Computable'',
Max-Planck Institute for Computer Science, Saarbruecken.
Also: INRIA, Sophia-Antipolis (Aug 18).

Mar 26, 2004:

``Exact Geometric Computation: Overview''
Chonnam National U.
Also: Korea Institute for Advanced Study (KIAS, Apr 2),
National U of Singapore (Apr 6).

Feb 6, 2004:

``Theory of Real Approximation''
University of Tokyo.
Also: National U of Singapore (Apr 14),
Seoul National U (Apr 22),
Korea Institute for Advanced Study (KIAS, May 14),
Korean Advanced Institute of Sci. and Tech. (KAIST, May 21).

Feb 2, 2004:

``Complete Subdivision Algorithm: Intersecting Bezier Curves''
Japan Advanced Institute of Sci. and Tech. (JAIST).
Also: U of Tokyo (Feb 4),
National U of Singapore (Apr 12),
KIAS (Apr 27),
MPI (Jul 26),
INRIA (Aug 17).

Nov 22, 2003:

"Robust Geometric Computation: A Ten Year Perspective.''
Korean Computer Graphics Society, Biannual Meeting, SNU Computer Science Institute.

May 18-21, 2003:

``On Guaranteed Accuracy Computation'',
Keynote Talk, International Conf. on Computational Science and Its Applications (ICCSA 2003), Montreal, Canada.
Also: MPI (Jul 8),
Trinity College Dublin (Aug 8).

Oct 13-14, 2002:

``On Guaranteed Accuracy Computation'',
Keynote Speech, National Computer Theory Conference, Changsha, China.

July 2-4, 2002:

6 Lectures on Computational Geometry and Visualization,
Ehwa Womans University, Seoul, Korea.

Nov 5-8, 2001:

Minisymposium on Robust Geometric Computation
SIAM conference on Geometric Design and Computing, Sacramento.

Oct 1--5, 2001:

``Roots of polynomials: Sturm theory and Computing with algebraic numbers'',
2 hr Lecture, Chee Yap. Workshop on Computer Algebra in Geometric Computing, Lorentz Center, Leiden University, The Netherlands.
Kickoff Workshop for Effective Computational Geometry for Curves and Surfaces Project (ECG Project)

July 25--27, 2001:

``Towards Robust Geometric Computation'', Chee Yap and Kurt Mehlhorn, Fundamentals of Computer Science Study Conference, National Academy of Sciences, Washington DC, July 25-27, 2001. Abstract.

June 27--29, 2001:

``Exact Geometric Computation: Survey and Tutorial'', Invited, Chee Yap. Workshop on Geometric Computing, University of Hong Kong, June 27--29, 2001. Final Program.

Mar 18--23, 2001:

``Exact Geometric Computation and Randomized Theorem Proving'', Chee Yap. Dagstuhl Seminar on Computational Geometry.
Also: INRIA, Sophia-Antipolis, Mar 13.

Mar 12--16, 2001:

`` Challenges and Issues in Robust Geometric Computation'', Chen Li. DIMACS Workshop on Algorithmic and Quantitative Aspects of Real Algebraic Geometry in Mathematics and Computer Science.

Jan 7--9, 2001:

`` A New Constructive Root Bound for Algebraic Expressions '', C. Yap and C. Li. 12th ACM-SIAM Symp. on Discrete Algorithms (SODA'01), Washington DC.

Oct 27--28, 2000:

``Recent Progress in Core Library'', C. Yap and C. Li, 10th Annual Fall Workshop on Computational Geometry, SUNY Stony Brook.

Sep 25-27, 2000:

``Randomized Zero Testing of Radical Expressions and Elementary Geometry Theorem Proving'', by Daniela Tulone, Chee Yap and Chen Li. The Third International Workshop on Automated Deduction in Geometry (ADG'2000), Zurich, Switzerland.

May 2, 2000:

`` A New Computational Paradigm: Robustness as a Resource ''
talk by Chee Yap at Distinguished Computer Scientists Symposium: Frontiers of Research in the New York Area, sponsored by the New York Academy of Sciences.

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