Marcel Ortgiese

I am a postdoc in the group of Jochen Blath at the TU Berlin, see also the webpage of the probability group. From October 2009 until March 2011, I was postdoc at the IRTG SMCP based in Berlin. My PhD was supervised by Peter Mörters at the University of Bath. My research is in probability theory and in particular I am interested in stochastic processes in random environment (polymer models and parabolic Anderson model).

Photo of me Address:
TU Berlin, Fakultät II
Institut für Mathematik, MA 7-4
Straße des 17. Juni 136
10623 Berlin
Germany

Office: MA 769

Phone number: 0049 30 314 25765

Email: ortgiese 'at' math.tu-berlin.de

Office hours: Thursday, 9:00 - 11:00. [No office hours on the 19 April.]

Publications / Preprints:

Peter Mörters and Marcel Ortgiese
Small value probabilities via the branching tree heuristic
Bernoulli, 14(1): 277-299, 2008.
Peter Mörters and Marcel Ortgiese
Minimal supporting subtrees for the free energy of polymers on disordered trees
Journal of Mathematical Physics 49, 2008 (abstract).
Peter Mörters, Marcel Ortgiese and Nadia Sidorova
Ageing in the parabolic Anderson model
Annales de l'Institut Henri Poincaré: Probab. et Stat., 47(4): 969-1000, 2011.

[Preprint@arXiv:0910.5613] [Supplement: Animation of limiting process]
Frank Aurzada, Hanna Döring, Marcel Ortgiese and Michael Scheutzow
Moments of recurrence times for Markov chains
Electronic Communications in Probability, 16:296-303, 2011.
Jochen Blath and Marcel Ortgiese
Properties of the interface of the symbiotic branching model
TUB Preprint, 2012.
Tom Alberts and Marcel Ortgiese
The near-critical scaling window for directed polymers on disordered trees
Preprint, arXiv:1205.0737, 2012.

Translation:

Hans-Otto Georgii. Stochastics. Introduction to probability and statistics. Translated from the 2007 3rd German edition by Marcel Ortgiese, Ellen Baake and Hans-Otto Georgii. Walter de Gruyter & Co., Berlin, 2008.

Teaching:

Sommersemester 2012:

Vorlesung: Stochastik für Informatiker (ISIS).
Übung: Maß- und Integrationstheorie.
Seminar: Stochastik (mit J. Blath u. N. Kurt).

Wintersemester 2011/12:

Vorlesung: Versicherungsmathematik.
Seminar: Stochastische Prozesse in der Evolutionsbiologie (mit J. Blath und N. Kurt).

Sommersemester 2011:

Übung zur Vorlesung: Maß- und Integrationstheorie.
Tutorium zur Vorlesung: Analysis II für Mathematiker.

Slides of selected talks:

Ageing in the parabolic Anderson model [pdf, printable pdf]
The minimal supporting tree for the free energy of a random polymer model [pdf].
Small value probabilities via the branching tree heuristic [pdf].

Other documents:

05/12/08: Ageing in the parabolic Anderson model. Extended abstract. Workshop on "Interplay of Analysis and Probability in Physics", Oberwolfach.
17/11/08: Lecture: Applications of large deviations: the parabolic Anderson model (as part of a graduate course on Large deviations).
07/07/07: Poster: Directed polymers in a random environment: localisation in the weak disorder phase (pdf).
presented at the LMS Symposium, Recent Developments in Random Walks, Durham.
01/12/06: Lecture: Speed of biased random walks on Galton-Watson trees (as part of the reading seminar "Probability on trees").

Links

Conferences:
- Probabilistic Structures in Evolution, 19 - 21 September 2012
- Spring meeting Beijing/Bielefeld - Berlin/Zurich, 30 March - 01 April 2011, TU Berlin.
Graduate school: IRTG SMCP.
Probability group, TU Berlin.
Probability lab, University of Bath.
Seminars in Berlin:
- Seminars in probability in Berlin.
- Oberseminar "Stochastic processes in physics and biology", TU Berlin.
MathSciNet.

Last modified: 11 April 2012.