Mdtop January 2015

mdtop@mathdept.okstate.edu

1 participants
6 discussions

Topology seminar
by Henry Segerman 28 Jan '15

28 Jan '15

Trent Schirmer will speak tomorrow, Thur Jan 29, on: GK-Trisections of 4-manifolds and the Poincare Conjecture Abstract: A GK-trisection of a 4-manifold X is a decomposition of X into three simple handlebodies that intersect in a nice way. Introduced by Gay and Kirby, this construction bears many similarities to Heegaard splittings of 3-manifolds, and is amenable to study using 3-manifold techniques, as is well illustrated in a recent paper by Meier and Zupan. In my talk I will describe how GK-trisections provide new approaches to the 4-dimensional smooth Poincare Conjecture. These approaches are essentially the analogues of failed "Heegaard splitting" approaches to the 3-dimensional Poincare Conjecture. However, the fact that the 3d Poincare conjecture is true implies several statements about or related to Heegaard splittings that maybe, just maybe, can somehow be lifted to statements about trisections that imply the 4-d conjecture.

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Spring 2015 Redbud Geometry / Topology Conference
by Henry Segerman 25 Jan '15

25 Jan '15

First Announcement Spring 2015 Redbud Geometry / Topology Conference WHEN: April 3-5, 2015 WHERE: Oklahoma State University SPEAKERS: Ken Baker, University of Miami John Etnyre, Georgia Tech Dave Futer, Temple University Matt Hedden, Michigan State University Efstratia Kalfagianni, Michigan State University Emmy Murphy, MIT Sinem Onaran, Hacettepe University Jessica Purcell, Brigham Young University Laura Starkston, University of Texas, Austin Andy Wand, University of Nantes The Spring 2015 Redbud conference will be held at Oklahoma State University April 3–5, 2015. The Redbud conference is a regional conference in topology and geometry with participants from the University of Oklahoma, Oklahoma State University, the University of Arkansas, and elsewhere. Friday 3rd of April will be a graduate student workshop, with introductory talks on contact topology and hyperbolic geometry. The main conference will be held on Saturday 4th and Sunday 5th of April. We anticipate funding that will allow us to cover a portion of the travel expenses for participants without other means of support. Graduate student, recent Ph.D.s, and mathematicians in underrepresented groups working in geometric topology are especially encouraged to apply for funding. The conference website is http://math.okstate.edu/redbud We hope to see you in April! Local organizers: Sean Bowman Danielle O'Donnol Henry Segerman

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Ken Baker seminar
by Henry Segerman 23 Jan '15

23 Jan '15

Based on the responses I got back, I have booked MSCS 514 for Ken Baker to speak at 4pm on Monday April 6. Henry

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Ken Baker seminar
by Henry Segerman 23 Jan '15

23 Jan '15

Ken Baker has offered to give a topology seminar on either Monday or Tuesday after the Redbud conference (6th or 7th April). This will have to be a special seminar since he cannot be here on the Thursdays either side of Redbud. Let me know if you would like to attend Ken's talk but have conflicts on the afternoons of either of those days. Thanks, Henry

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Seminar organisation notes
by Henry Segerman 15 Jan '15

15 Jan '15

The current schedule is as follows: Jan 22 - Jan 29 - Trent Schirmer Feb 5 - Feb 12 - (clash with interview colloquium) Feb 19 - Feb 26 - Tian Yang (Stanford) Mar 5 - (Conference at Arkansas, Benson Farb speaking) Mar 12 - Henry Segerman Mar 19 - (spring break) Mar 26 - April 2 - (Redbud the coming weekend) Apr 9 - Pengcheng Xu Apr 16 - Kenji Kozai (Berkeley) Apr 13 - Apr 30 - People to invite: (Schirmer:) Nel Abdiel, Jeff Meier (Jaco:) Jonathan Spreer, Stephan Tillmann, Cameron Gordon, Rob Kirby If you would like to speak, or would like to invite anyone, let me know. Cheers, Henry

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Topology seminar organizational meeting
by Henry Segerman 14 Jan '15

14 Jan '15

Let's meet to organise the topology seminar this semester, 3:30pm tomorrow, Thursday Jan 15, in MSCS 514. Apologies for the short notice - I only just got back into town. Just to be extra confusing, I booked MSCS 514 for this semester (rather than 422 as last semester). 422 has nicer boards, but the air conditioning is a little too fierce. Henry

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Mdtop January 2015