April 9	Jed Mihalisin , University of Montana (webpage: http://www.jedsmath.com/ ) Polytopes and Clique Replacements.
	April 16	Rekha Thomas , University of Washington (webpage: http://www.math.washington.edu/~thomas/ ) Counting Graph Homomorphisms.
	April 23	Harm Derksen , University of Michigan (webpage: http://www.math.lsa.umich.edu/~hderksen/ ) Symmetric and quasi-symmetric functions associated to polymatroids.
	April 30	Jim Haglund , University of Pennsylvania (webpage: http://www.math.upenn.edu/~jhaglund/ ) Quasisymmetric functions and the combinatorics of Macdonald polynomials.
	May 7	Charles Doran , University of Washington (webpage: http://www.math.washington.edu/~doran/ ) Reflexive polytopes and string duality.
	May 14	Megumi Harada , McMaster University (webpage: http://www.math.mcmaster.ca/~haradam/ ) Hyperkahler Kirwan surjectivity for quiver varieties: Morse theory and examples.
	May 21	Joel Spencer , New York University (webpage: http://cs.nyu.edu/cs/faculty/spencer/ ) 77 Years of Ramsey $R(3,k)$ (and Counting!).
	May 28	Andy Frohmader , University of Washington (webpage: http://www.math.washington.edu/ ) Face vectors of flag complexes and the Charney-Davis conjecture.
	June 4	Alvaro Pelayo , Massachusetts Institute of Technology (webpage: http://www-math.mit.edu/~apelayo/ ) TBA.