January 2013 - Mdtop - mathdept.okstate.edu

Seminar tomorrow
by Jesse Johnson 30 Jan '13

30 Jan '13

Sean will given the topology seminar this week, Thursday at 3:30 in 514. Title: Bridge number of knots obtained by twisting Abstract: Twisting along a curve (in a surface) or along an annulus (in a 3--manifold) is one way to obtain new knots from old. I'll discuss these operations with an eye towards how they affect the bridge number of the knots. Finally, I'll use a new theorem of Baker-Gordon-Luecke to answer several questions from my talk last semester.

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CBMS Notes
by Jesse Johnson 25 Jan '13

25 Jan '13

Wise - LectureNotesCBMS.pdf<https://docs.google.com/file/d/0BxG6UbtygwrUOVl6eS1hVEJNdWc/edit> I managed to track down a copy of the CBMS notes and they are attached to this e-mail. Jesse

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VHC Reading group
by Jesse Johnson 25 Jan '13

25 Jan '13

The first meeting of the VHC reading group will be this afternoon at 2:30 in MSCS 405. (Sorry I'm sending this to everyone on the mdtop list: I didn't take attendance after the seminar yesterday!) I am still trying to track down a PDF copy of Dani Wise's CBMS lecture notes on cube complexes, but you can find a very rough outline of his approach here: http://ldtopology.wordpress.com/2012/03/06/wises-conjecture/ You may also want to look at Ian Agol's preprint on the arXiv http://front.math.ucdavis.edu/1204.2810 and the paper by Bergeron and Wise that started it all http://front.math.ucdavis.edu/0908.3609 Jesse

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Topology seminar tomorrow
by Jesse Johnson 23 Jan '13

23 Jan '13

Dear Topologists and Friends of Topology, Trent will give the first seminar talk of the semester tomorrow (Thursday) at 3:30 in MSCS 514. Title and abstract are below: Title: Lower bounds on the Heegaard genus of amalgamated $3$-manifolds. Abstract: I describe some new results of mine which place lower bounds on the Heegaard genus of a $3$-manifold which is obtained by gluing two $3$-manifolds together along torus boundary components. As an application, I also put a lower bound on tunnel number degeneration under connected sum of knots. These kinds of problem have been worked on for quite some time, but as far as I know my techniques are new and the results are of a different flavor.

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Fwd: 2013 Spring Redbud Geometry and Topology Conference
by Jesse Johnson 22 Jan '13

22 Jan '13

Below is the announcement for the Spring Redbud conference, which will be March 8-10, 2013 at U. Arkansas. The theme is contact topology and Elena will be one of the speakers. When the date gets closer, we can start coordinating rides, etc. Jesse ---------- Forwarded message ---------- From: Jeremy Van Horn-Morris <jv002(a)uark.edu> Date: Tue, Jan 22, 2013 at 12:38 PM Subject: 2013 Spring Redbud Geometry and Topology Conference To: GEOMETRY(a)listserv.utk.edu Announcement for the 2013 Spring Redbud Geometry and Topology Conference University of Arkansas March 9-10, 2013 Graduate workshop, Friday, March 8, 2013 http://www.comp.uark.edu/~jv002/redbud/ The second Spring Redbud Geometry and Topology conference will be happening on March 9-10, 2013, with a graduate workshop to be held on Friday, March 8. Details can be found at the conference website: http://www.comp.uark.edu/~jv002/redbud/ The speakers are: John Etnyre (Georgia Tech) Matt Hedden (Michigan State) Gordana Matic (UGA) Elena Pavelescu (Oklahoma State) Josh Sabloff (Haverford) Lisa Traynor (Bryn Mawr) Shea Vela-Vick (LSU) The conference is being organized by Dan Rutherford and Jeremy Van Horn-Morris. We anticipate having funding from the NSF to help with travel and accommodations, especially for graduate students and young researchers, women and minorities. Many thanks! Jeremy Van Horn-Morris on behalf of the organizers. -- Jeremy Van Horn-Morris Department of Mathematics University of Arkansas 420 SCEN 1 University of Arkansas Fayetteville, AR 72701 (479) 575-8630 (fax) (479) 575-6102 (office) =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message was sent to you via the Geometry List, which announces conferences in geometry and closely related areas to over 1200 mathematicians worldwide. At http://listserv.utk.edu/archives/geometry.html there are many functions available, including checking the archives since November 2005, changing your e-mail address or preferences, and joining/leaving the list. If you have problems that cannot be resolved at this website, send a message to cplaut(a)utk.edu. Before sending an announcement, please carefully read the following. Any announcements that are *not* about conferences (e.g. those about jobs, journals, books, etc.) will be rejected by the moderator without comment. To announce a geometry or closely related conference, send the announcement (including a conference web site if possible) to geometry(a)listserv.utk.edu. The moderator cannot edit your message; list members will receive the announcement as an e-mail from you EXACTLY as you submitted it. For example, if your submission starts with "Please post this on the geometry list" then your conference announcement will also begin with that statement. In order to keep down the volume of e-mail, only TWO announcements per conference will be approved by the moderator. The "subject" of your message should include the name of the conference and the number (first or second) of the announcement, e.g. Gauss Memorial Lectures in Geometry: Second Announcement. Please check that your announcement (especially the website) is correct. Corrections will be approved only in the most critical situations, e.g. if corrected information is not available on the website. If you send a submission from an e-mail address that is not subscribed to the geometry list then you will be sent an e-mail asking for confirmation. This feature is designed to thwart the hundreds of machine-generated spam that are sent to the list and would otherwise have to be manually blocked by the moderator. The Geometry List is sponsored and maintained by the Mathematics Department, The University of Tennessee, Knoxville.

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Organizational meeting
by Jesse Johnson 07 Jan '13

07 Jan '13

Dear Topologists and Friends of Topology, We will have an organizational meeting for the topology seminar this Thursday (the 10th) at 3:30 in MSCS 514. Jesse

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