## Math Calendar

Monday, March 19, 2018

11:00-12:00

BBG 4.01

In the talk I will give a short introduction of financialmathematics and then a summary of my thesis. I will give a goodintroduction of the notations and the necessary terminology likeMarkov processes, Levy processes and scale functions of Levy processes. Then wewill model the underlying stock of the option by a spectrally negative Levyprocess and show that a nice solution of the option can be found which dependson the scale functions of the underlying Levy process.

15:00-17:00

HFG 610

Tuesday, March 20, 2018

13:15-15:00

HFG 610

16:00-17:00

HFG 611

Utrecht Geometry Center Seminar

Renee Hoekzema (Oxford) - Manifolds with odd Euler characteristic and higher orientability

see description

Abstract: Orientable manifolds have even Euler characteristic unless the dimension is a multiple of 4. I give a generalisation of this theorem: k-orientable manifolds have even Euler characteristic (and in fact vanishing top Wu class), unless their dimension is 2^{k+1}m for some integer m. Here we call a manifold k-orientable if the i^{th} Stiefel-Whitney class vanishes for all i< 2^k. This theorem is strict for k=0,1,2,3, but whether there exist 4-orientable manifolds with an odd Euler characteristic is a new open question. Such manifolds would have dimensions that are a multiple of 32. I discuss manifolds of dimension high powers of 2 and present the results of calculations on the cohomology of the second Rosenfeld plane, a special 64-dimensional manifold with odd Euler characteristic.

Thursday, March 22, 2018

15:30-17:00

KBG Atlas

The Utrecht Mathematical Colloquium

Georg Dolzmann (Universität Regensburg) - Applications of Modern Methods in the Calculus of Variations to Nonlinear Elasticity; Relaxation and its Numerical Approximation

see description

The calculus of variations has a long tradition in mathematical research and has seen in the past 25 years significant developments inspired by applications in nonlinear elasticity. The notion of quasiconvexity in the sense of Morrey plays a central role in existence theorems relying on the direct method in the calculus of variations. In this lecture, some of these aspects will be reviewed and then applied to recent relaxation results which allow the investigation of models in nonlinear elasticity including constraints like preservation of orientation or incompressibility. The use of these ideas in numerical schemes will also be briefly discussed. This is joint work with Sergio Conti (Bonn).

Friday, March 23, 2018

13:15-14:15

Duistermaat room

Extra Number Theory Talk

Marta Pieropan (EPFL Lausanne) - Rational points over C_1 fields of characteristic 0

see description

Abstract:

In the 1950s Lang studied the properties of C_1 fields, that is, fields over which every homogeneous polynomial of degree at most n in n+1 variables has a nontrivial solution. I will explain how to find points on complete intersections of forms of products of projective spaces over C_1 fields of characteristic 0.

In the 1950s Lang studied the properties of C_1 fields, that is, fields over which every homogeneous polynomial of degree at most n in n+1 variables has a nontrivial solution. I will explain how to find points on complete intersections of forms of products of projective spaces over C_1 fields of characteristic 0.

Monday, March 26, 2018

Tuesday, March 27, 2018

13:15-15:00

HFG 610

16:00-17:00

HFG 611

Monday, April 2, 2018

Tuesday, April 3, 2018

Monday, April 9, 2018

Tuesday, April 10, 2018

16:00-17:00

HFG 611

Utrecht Geometry Center Seminar

Anna Haensch (Duquesne University/MPIM Bonn) - Spinor regular ternary quadratic forms

see description

Abstract: It is well known that there is no direct integral analogue to Hasse’s local-global principle. An integral lattice which satisfies a local-global principle (that is, a lattice that represents everything globally which is represented locally at every prime) is called regular. Extending this notion of regularity introduced by Dickson in 1939, a positive definite ternary integral quadratic form is said to be spinor regular if it represents all the positive integers represented by its spinor genus (that is, all positive integers represented by any form in its spinor genus). Jagy conducted an extensive computer search for primitive ternary quadratic forms that are spinor regular, but not regular, resulting in a list of 29 such forms. In this talk, I will discuss recent work with A. G. Earnest in which we verify the completeness of this list.

Thursday, April 12, 2018

16:00-17:00

t.b.a.

Monday, April 16, 2018

Tuesday, April 17, 2018

16:00-17:00

HFG 611

Monday, April 23, 2018

Tuesday, April 24, 2018

16:00-17:00

HFG 611

Monday, April 30, 2018

Tuesday, May 1, 2018

Monday, May 7, 2018

Tuesday, May 8, 2018

16:00-17:00

HFG 611

Monday, May 14, 2018

Tuesday, May 15, 2018

16:00-17:00

HFG 611

Thursday, May 17, 2018

16:00-17:00

HFG 611

Tuesday, May 22, 2018

16:00-17:00

HFG 611

Monday, May 28, 2018

Tuesday, May 29, 2018

Monday, June 4, 2018

Tuesday, June 5, 2018

16:00-17:00

HFG 611

Monday, June 11, 2018

Tuesday, June 12, 2018

Thursday, June 14, 2018

15:30-16:30

Ruppert ROOD

Monday, June 18, 2018

Tuesday, June 19, 2018

Monday, June 25, 2018

Tuesday, June 26, 2018

16:00-17:00

HFG 611

Tuesday, July 3, 2018

Tuesday, July 10, 2018

Tuesday, July 17, 2018

Tuesday, July 24, 2018

Tuesday, July 31, 2018

Tuesday, August 7, 2018

Tuesday, August 14, 2018

Tuesday, August 21, 2018

Tuesday, August 28, 2018

Tuesday, September 4, 2018

Tuesday, September 11, 2018