As part of the R.W. Yeagy Colloquium Series, on Monday September 25^{th}, Dr. Katie Anders from the University of Texas at Tyler will be giving a talk titled “Rooted Forests That Avoid Sets of Permutations” in room 357 of the Mathematics Building at 3:30 PM.

Abstract: An unordered rooted labeled forest avoids the pattern if the sequence obtained from the labels along the path from the root to any vertex does not contain a subsequence that is in the same relative order as . We enumerate several classes of forests that avoid certain sets of permutations, including the set of unimodal forests, via bijections with set partitions with certain properties. (flyer in PDF form)