**Math table talks**:

- Oct 23, 2018: Goldbach Comets [PDF] ( Part of Slides [PDF])
- Feb 8, 2018: Euler Day: Polishing Euler's Gem [HTML]
- October 18, 2016: Bowen Lanford Zeta [PDF]
- March 8, 2016: Wu characteristic [PDF]
- Feb 24, 2009: Treasure Hunting Euler Bricks [HTML]
- Apr 1, 2007: Mathematics and AI [PDF], Worksheet [PDF],
- Feb 24, 2004: Applications of Subharmonic functions [PDF]
- Dec 17, 1999: Billiards [PDF] . (My interview talk was run as a math table event.)

Fast multiplication | Fall 2018 | Math 121 guest lecture | Handout [PDF], Slides (youtube), and Mathematica notebook | |

Goldbach Comets | Fall, 2018 | Mathtable | Oct 23, 2018: Goldbach Comet [PDF] ( Part of Slides [PDF]) | |

The amazing world of simplicial complexes |
April 28, 2018 | AMS meeting | Notes (ArXiv), Slides (youtube) | |

Battles about Mathematical Syntax | Spring, 2018 | Extension STEM club | April 28, 2018: Part of Slides [PDF] . | |

Polishing Euler's gem | Spring, 2018 | Math Table | Website with talk, slides and handout | |

Bowen-Lanford Zeta Function | Fall, 2016 | Math Table | Handout [PDF] | |

3D Printing Experiments in Mathematics | September 30, 2016 | SIAM meeting | Slides on Youtube, SIAM talks on ED16 - MS3-3 The PDF | |

Wu Characteristic | March 8, 2016 | Math table | Handout [PDF] | |

Birkhoff Sums over Golden rotations | February 23, 2015 | Boston University | Notes [PDF] (43 pages), Keynote Slides [PDF] Abstract of talk [TXT] | |

Cauchy-Binet | Summer 2014 | Slide notes [HTML] slides [PDF], article [Journal LINK], ArXiv. | ||

Chinese Remainder Theorem | Spring 2014 | Math circle | Slides [PDF]. | |

Mathematical structures in graph theory | January 15, 2014 | Joint AMS meeting, 2014 | Slides [HTML], Slides [PDF], Part II not delivered [PDF]. | |

Orbital Networks | Fall 2013 | Slides [HTML]. | ||

Illustrating mathematical proofs | May, 10 2013 | Talk Youtube , Paper ArXiv, Book Trieste. | ||

The Dirac operator of a graph | June 5, 2013 | ILAS 2013 | Slides from ILAS 2013 [PDF]. Notes [PDF]. | |

From Archimedes to 3D printing: or from the sphere to the Mandelbulb | May 18, 2013 | SIC 2013 | Talk summary [PDF], Slides [PDF] 86 Meg | |

Illustrating mathematical proofs using 3D printers | May 6, 2013 | Announcement PDF, Book | Slides [PDF] 112 Meg, Trieste Talk on Youtube. | |

If Archimedes knew functions ... | March 6, 2013 | Pecha Kucha event | Slides [HTML] and [PDF]. [Youtube, uploaded 10/20/2016] | |

Geometric Problems in Graph theory | Nov 16, 2012 | Fall 2012 Section Meeting | Slides [PDF], Clips [M4V] for Ipod. | |

Geometry of networks | Apr 1, 2012 | Math Circle at Northeastern | Handout [PDF], [PDF Slides] [Media for Ipod] | |

Balancing Risks | September 30, 2010 | Balancing Risks in Research and Teaching | [PDF] 134 slides (Apropos: 2021: Yearbook letter to the class of 2021). | |

Polyhedra and Polytopes | Dec 6, 2009 | Math Circle at Northeastern | Handout [PDF], Slides I [PDF][Media for Ipod] Slides II [PDF][Media for Ipod] | |

Remarkable Talks | September 1, 2009 | Some movies shown in a teacher training orientation | [HTML] with movies | |

Vector bundle illustrations | September, 2009 | Some slides shown in a class of Lydia Bieri | [PDF], [Ipod] | |

Technology in the Classroom | March 19, 2009 | Presentation in a class of Andy Engelward | Webpage, Demo, 2011, Demo, 2012 | |

Treasure Hunting Perfect Euler Bricks | Feb, 2009 | Mathtable talk | Handout [PDF], Treasure map | |

How Chaos inspires other disciplines | Feb 7, 2008 | Lecture organized by Society for Creativity and Innovation at Harvard College (general audience) | Slides [PDF, 44Meg], Annotations to lecture [PDF],[Media for Ipod, 220Meg] | |

The oldest unsolved problem in mathematics | Dec 2, 2007 | Math Circle at Northeastern University | Handout [PDF], Slides [PDF][Media for Ipod] | |

The structure from motion problem | October 29, 2007 | Colby Colloquium (undergraduate level) | Slides [PDF] | |

On the mathematics of panorama photography | July 11, 2007 | Math NOW series of Harvard Summer school (precalculus level) | Slides [PDF] | |

Mathematics and AI | Apr 1, 2007 | Math Circle at Northeastern University | Handout [PDF][Media for Ipod] | |

ICTM 07: Benefits and Risks of Media and Technology in the Classroom | Feb 15-18, 2007 | ICTM Boston, 2007 | 9 slides and paper draft [PDF] | |

A lecture on Diophantine equations | Apr 30, 2006 | Math Circle at Northeastern University | Handout [PDF] | |

End lectures in College Teaching | Sep 12, 2006 | Harvard University | Movie clips [QT] | |

First lectures in Calculus Teaching | Sep 13, 2005 | Harvard University | Movie clips [QT] | |

Number theory in dynamical system | Nov. 5, 2004 | Tufts Colloquium | Slides [PDF] | |

A multivariable Chinese remainder theorem and Diophantine approximation | Apr 11, 2005 | Brandeis Colloquium | Slides [PDF],Multivariable Chinese remainder theorem [PDF],Curve approximation theorem | |

Pitfalls in Calculus teaching and learning | 5/20/05 | Harvard University | Notes [HTML],[PDF] | |

An hour on complex numbers | September 2004 | Math Warm Up Series | Handout [PDF],Problems [PDF]Slides [PDF] | |

Applications of Subharmonic functions | Feb, 2004 | Mathtable | Handout [PDF] | |

Web pedagogy Seminar | January 2004 | Harvard University | Slides [PDF] | |

Workshop on the use of Technology in the classroom | April 2004 | Harvard University | Slides [PDF], on An artificial intelligence experiment in college math education (PDF) | |

Fashion in Mathematics | May 2004 | Math Circle | Handout [PDF] | |

Billiards | November 2003 | Math Circle | Handout [PDF] | |

Enriching teaching with technology | Aug 11, 2003 | Harvard University | Notes [PDF] | |

On a notion of Integrability | March 2002 | UAB Conference | Notes [PDF] | |

A mini Mathematica tutorial | April 22, 2001 | Harvard university, Physics Department | [HTML] | |

The web in undergraduate math instruction | March 8, 2001 | Harvard university, friends talk | [HTML] | |

Open problems in Hamiltonian dynamics | October 19, 2000 | Montana State University Bozeman | [HTML],[PDF],[GIF] | |

Billiards | December 1999 | Harvard University (my interview talk of December 17th) | Handout [PDF],Ellipse property[PDF] |