Courses  in Stochastics in Autumn 2003


Christel Geiss

An introduction into probability theory
MAT283, 3 ov, 34 h

Time and Place:  Monday   12-14 MaD 381
                 Tuesday  14-16 MaD 381

First lecture: 08/09/2003

Description: Probability theory is the starting point to understand
many random phenomena. How one can define probability properly?
What are random variables? And why is it correct if one uses a
Gaussian distribution to model measuring errors?

Contents of the lecture:
-) Probability spaces
-) Some special distributions
-) Random variables
-) Lebesgue integral
-) Sequences of random variables

Literature:
P. Billingsley: Probability and measure (Wiley)
A.N. Shiryaev: Probability (Springer)
D. Williams: Probability with martingales (Cambridge)

Exercises:
Problems 15/09/2003
Problems 22/09/2003
Problems 29/09/2003
Problems 06/10/2003
Problems 13/10/2003
Problems 20/10/2003
Problems 27/10/2003
Problems 03/11/2003
Problems 10/11/2003
 

Topics:
Tests 12/11/2003 and 03/12/2003


Stefan Geiss

Stokastiset differentiaaliyhtälöt
(Stochastic differential equations)
MAT359, 5 ov, 50 h

Time and Place:  Monday    10-12 MaD 381
                 Wednesday 10-12 MaD 381

First lecture: 08/09/2003

Description: Stochastic differential equations are a fundamental tool
in mathematics and in applications. Given a Brownian motion W=(W_t)_{t\ge 0},
a stochastic differential equation reads as

dX_t = a(t,X_t) dt + b(t,X_t) dW_t.

The solution should be a stochastic process (X_t)_{t\ge 0}. But what
is the meaning of this equation? Or going one step back: what is a
Brownian motion? Or, if we know this: what are the solutions, are they
unique, what properties do they have? The course intends to answer
(at least some of) the questions.

Contents of the lecture:
-) Brownian motion
-) Stochastic integrals
-) It\^o's formula
-) Stochastic differential equations

Literature:
I. Karatzas and A. Shreve: Brownian motion and stochastic calculus
D. Revuz and M. Yor: Continuous martingales and Brownian motion

Exercises:
Problems 15/09/2003
Problems 22/09/2003
Problems 06/10/2003
Problems 13/10/2003
Problems 20/10/2003
Problems 27/10/2003
Problems 03/11/2003
Problems 10/11/2003
Problems 17/11/2003
Problems 24/11/2003
Problems 01/12/2003