### Mathematisches Seminar: Pseudodifferential operators (SoSe 2014)

Ankündigung/announcement.

Time and place: Tuesday 16-18Uhr in B 045.

First meeting: Tuesday April 8th (2014) (Intro, motivation, topics).

Vorträge können auch auf Deutsch gehalten werden!

Synopsis: The theory of pseudodifferential operators arose in the 1960's as a tool in the study of elliptic partial differential equations (the Laplace equation, Poisson equation, Dirichlet and Neumann boundary value problems etc.). Such operators are a generalisation of Partial Differential Operators (PDO's), and they have since then become a strong and useful tool in many other areas of analysis, such as Harmonic Analysis, Spectral Theory, and Index Theory for elliptic operators on manifolds (they are an important ingredient in many proofs of the Atiyah-Singer Index Theorem).

This seminar will give an elementary introduction to the theory of pseudodifferential operators and their properties. It will include an introduction to the Fourier transform, (tempered) distributions, and Sobolev spaces, which are by themselves very useful tools.

Topics to be discussed: Schwartz functions (S) and tempered distributions (S'), The Fourier transform on S and S', Sobolev spaces, Pseudodifferential symbols, Oscillatory integrals, Pseudodifferential operators (ΨDO's), The action of ΨDO's on S, S', and Sobolev spaces, Global regularity of elliptic PDO's (and ΨDO's), Gårding's inequality, Applications.

Audience: 3rd year Bachelor students and Master students of Mathematics and Physics, TMP-Master.

Prerequisites: Analysis I-III. Basic knowledge of Functional Analysis and/or Partial Differential Equations is helpful, but not required.

Language: The speakers can choose between English and German.

Literature: [R] X. Saint Raymond, Elementary introduction to the theory of pseudodifferential operators, CRC Press, Boca Raton, 1991. (Available in several copies in the library - QR-Code.)

Supplementary literature (not needed!):
S. G. Krantz, Partial Differential Equations and Complex Analysis, CRC Press, Boca Raton, 1992.
M. M. Wong, An Introduction to pseudo-differential Operators, 2nd ed., World Scientific, Singapore, 1999.
B. E. Petersen, Introduction to the Fourier transform & pseudo-differential operators, Pitman, Boston, 1983.
L. Hörmander, The analysis of linear partial differential operators III, pseudo-differential operators, corr. reprint, Springer, Berlin, 1994.
M. Shubin, Pseudodifferential operators and spectral theory, 2nd ed., Springer, Berlin, 2001.
A. Grigis and J. Sjöstrand, Microlocal Analysis for Differential Operators, Cambridge University Press, 1994.

A longer list can be found here.

(For more on Distribution Theory, see
[F-J] F. G. Friedlander and M. Joshi, Introduction to the Theory of Distributions (2nd Edition), Cambridge University Press, 1999. (Available in several copies in the library - QR-Code). Errata 1 Errata 2.)

Office hours: Thursday 10:15-11:00 (Room B 408) or by appointment via email.

Programme (Talks start at 16:15):

Datum Speaker           Title             Remarks
08.04.2014     Thomas Sørensen     Intro, motivation, topics.
15.04.2014 NO TALK Conference/Tagung
22.04.2014 NO TALK Easter/Ostern
25.04.2014 (08-10Uhr) Sondertermin (B 045) Thomas Sørensen More motivation on ΨDO's.
29.04.2014 Stavros Kontaras Fourier-transf. & distrib. in R^n. [R] p.5-15.
06.05.2014 Thomas Sørensen Fourier-transf. & distrib. in R^n ('Take Two'). [R] p.5-15.
13.05.2014 Leo Gebauer Sobolev spaces. [R] p.17-23.
13.05.2014 (Sondertermin 18-20Uhr) Robin Schlenga Payley-Wiener-Schwartz Theorem. [R] p.15-17(Thm1.13)+ex.1.7,1.8.
20.05.2014 Bernhard Pfirsch Def. and approx. of symbols. [R] p.29-32+ex.2.1,2.2,2.8(a)+(b).
27.05.2014 KEIN VORTRAG
03.06.2014 Bernhard Pfirsch Oscillatory integrals. [R] p.32-37+ex.2.3,2.4.
03.06.2014 (Sondertermin 18-20Uhr) Shan Wei Operations on symbols. [R] p.37-41+ex.2.5,2.8(c)+(d).
11.06.2014 (Sondertermin 08:30-10:00 in B 045) Rami Daknama Ellipticity. [R] Thm2.10+ex.2.6+2.9.
17.06.2014 Maik Urban ΨDO's: Action on S and S'. [R] p.47-52.
24.06.2014 Toni Scharle Action in Sobolev spaces. [R] p.52-56+ex.3.7(b)(2nd half), maybe ex.3.3,3.4,3.5.
01.07.2014 Sørensen Gårding's Inequality. [R] Thm3.9+ex.3.7(a)+(b)(1st half).
08.07.2014 NO TALK Conference/Tagung

Wie halte ich einen Seminarvortrag? von Prof. Dr. Manfred Lehn, Johannes Gutenberg-Universität Mainz.

-----------------------------------

Letzte Änderung: 14 July 2014 (no more updates).

Thomas Østergaard Sørensen

 Home Teaching Publications Curriculum Vitae