Sasanka Roy (Chennai Mathematical Institute)

Approximate shortest descending path on a terrain
Sasanka Roy (Chennai Mathematical Institute, India)


A path from s to t on a polyhedral terrain is descending if the height of a point p never increases while we move p along the path from s to t. No efficient algorithm is known to find a shortest descending path (SDP) from s to t in a polyhedral terrain. We will discuss the pros and cons for finding the optimum path on general terrains and finally discuss an approximation algorithm that solve the SDP problem on general terrains. Our algorithm is simple, robust and easy to implement.

Based on joint work with Mustaq Ahmed, Sandip Das, Sachin Lodha, Anna Lubiw, and Anil Maheshwari.


Friday, October 4, 2013


12:30 pm - 1:30 pm

TASC1 Building, Room No. 9204, Simon Fraser University, Burnaby