York University - CSE 3101 - Summer 2006 Phuong Nguyen Summary of Lecture 3: 1.Quicksort and its analysis [Chapter 7] Proof of the worst-case running time of Quicksort, and some intuition for its performance. Also discuss Randomized-Quicksort. 2. Strassen's algorithm for matrix multiplication [Section 28.2] Also read Section 28.1 for some properties of matrix operations. 3. Finding the closest pair [Section 33.4] Explain why this can be done in time O(nlogn). Algorithm will be given in the next class.