Event time:

Tuesday, January 25, 2005 - 11:30am to Monday, January 24, 2005 - 7:00pm

Location:

431 DL

Speaker:

Richard Schwartz

Speaker affiliation:

University of Maryland

Event description:

The triangular billiards problem, which

goes back to the 1800s, asks if every triangular

shaped billiard table has a periodic billiard path.

The answer is easily seen to be yes for acute

triangles, right triangles, and triangles whose

angles are rational multiples of Pi. This leaves

the case of obtuse irrational triangles, about

which almost nothing is known. In my talk I will

present new results about the obtuse case, and

will demonstrate McBilliards, a graphical user

interface written by myself and Pat Hooper, which

reveals a wealth of new phenomena in connection

with the triangular billiards problem.

Special note:

Note special day!