OSU Mathematics Seminars and Colloquia
Calendar
Wed, Apr 26, 2017
Combinatorial and Commutative Algebra Seminar
3:30 PM
MSCS 405
Cohen-Macaulay monomial ideals arising from directed hypergraphs
Chase Meadors, OSU
Note the change in day due to the awards ceremony.
[Abstract] [PDF]
Abstract: In a 2003 paper, Herzog and Hibi study the Hibi ideal of a poset and describe its resolution in detail. Furthermore, they use this notion to classify Cohen-Macaulay bipartite graphs. In 2007 work, Carra'Ferro and Farrarello demonstrate a construction associating a bipartite undirected graph $G$ to a directed graph $D$, and re-cast the aforementioned classification in terms of the directed graph $D$. In particular, they show that $G$ is Cohen-Macaulay if and only if $D$ is acyclic and transitive. We study how and to what extent this result generalizes to to directed hypergraphs. Though we do not achieve a characterization as in the case of directed graphs, we demonstrate a class of directed hypergraphs and a sufficient condition for the associated undirected hypergraph to be Cohen-Macaulay.
Automatically add seminars to your own calendar (e.g., Google Calendar) via an ical link.

List of links (urls) directly to a seminar series.

Return to Math Department Login Page

To add/edit talks, please log in on the department web page, then return to Announce.
Alternatively if you know the Announce username/password, click the link below:

Announce Seminar Calendar Login