Mdtop

mdtop@mathdept.okstate.edu

247 discussions

Topology seminar
by Henry Segerman 15 Oct '14

15 Oct '14

Sean Bowman will speak in the topology seminar, Thursday 3:30pm, MSCS 422. Thin position, graph clustering, and applications We describe a novel algorithm for clustering vertices of graphs. The method is inspired by the technique of thin position in low dimensional topology. We show that a version of our algorithm works well on an important real world data set from biology. This is joint work with Doug Heisterkamp, Jesse Johnson, and Danielle O'Donnol.

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No topology seminar Thursday Oct 9
by Henry Segerman 08 Oct '14

08 Oct '14

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No topology seminar today
by Henry Segerman 02 Oct '14

02 Oct '14

There will be no topology seminar today.

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Topology seminar
by Henry Segerman 24 Sep '14

24 Sep '14

Danielle O'Donnol will speak at 3:30pm on Thursday 25th September, MSCS 422. Title: Intrinsic 3-linkedness is Not Preserved by Y-triangle moves

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Topology Seminar, Thursday 3:30pm, MSCS 422
by Henry Segerman 10 Sep '14

10 Sep '14

Trent Schirmer will speak on Thursday Sept 11: Title: A lower bound on tunnel number degeneration Abstract: The tunnel t(K) of a knot is given by the equation t(K)+1=g(X), where g(_) denotes Heegaard genus and X is the exterior of K. We prove that t(K#K')\geq \max{t(K),t(K')} for any pair of knots in S^3

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Topology reading seminar tomorrow
by Schirmer, Trent 10 Sep '14

10 Sep '14

Hi Everyone, Just a reminder that the reading seminar will happen at 11:00 tomorrow in room 205. Best, Trent

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Dinner Invite
by William Jaco 04 Sep '14

04 Sep '14

Members of the Topology Seminar and their spouse/partner/significant other (pick only one of these) are invite to our house for dinner/dessert after the Colloquium tomorrow, Friday, September 5. Arrive about 6:30pm. Address: 2219 Oak Trail Drive Phone if lost: 405-743-0771 *PLEASE RSVP (email is fine)* so we can plan. Thanks, bus and lin William "Bus" Jaco Regents Professor, Grayce B. Kerr Chair, and Head Department of Mathematics Oklahoma State University

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Topology seminar today 3:30, MSCS 422
by Henry Segerman 04 Sep '14

04 Sep '14

David Bachman (Pitzer college) Title: Bounding the concentration of curvature for topologically minimal surfaces Abstract: Inspired by parallel results in the theory of smooth minimal surfaces, we give limits on how concentrated the curvature of a topologically minimal surface can be. The proofs rely on a similar argument originally given by Hatcher and Thurston, and later revisited by Jaco and Sedgwick, showing that certain sets of boundary slopes must be finite. This is joint work with Ryan Derby-Talbot and Eric Sedgwick.

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Topology reading seminar
by Schirmer, Trent 02 Sep '14

02 Sep '14

Hi Everyone, Let's have the reading seminar start Thursday next week (September 11) instead of this week. I had forgotten that I have to fly back to California this Thursday for my friend's wedding. Best, Trent

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Topology Reading Seminar
by Schirmer, Trent 28 Aug '14

28 Aug '14

Hi Everyone, For everyone who's interested, we will be having a topology reading seminar on Thursdays, 11:00-12:00 in room 405. The paper is Kirby and Gay's "Trisections of 4-manifolds" which I've attached. The proof of their main result relies heavily on the use of Morse 2 functions, which are interesting in their own way. I've attached their paper on Morse 2-functions as well for anyone who's interested, although you don't need to know anything about them to understand the results of "Trisections..." I'll give the first presentation next week. Best, Trent

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