February Lectures

Week of February 6-10

Feb 7: Catalan numbers (cont). Stirling numbers and cycles in permutations.
Feb 9: Cycles in permutations (cont). No small cycles and all even cycles. Set partitions again.

Week of February 13-17

Feb 14: Exponential formula for labelled objects. Examples: 2-regular graphs, graphs by components, rooted labelled trees.
Feb 14 (this class substitute the class of Thursday February 16):
Exponential formula for unlabelled objects. Integer partitions. Rooted unlabelled trees.
Feb 16: Midterm test #1.

Week of February 20-24

Reading week: no lectures this week.

Week of February 27 - March 2

Feb 28: Comments about midterm and assignment 1. Finite fields. Restricted components.
Mar 1: Dirichlet generating functions and Mobius inversion. Bivariate generating functions and moments.

To January lectures.
To March lectures.