Sumários

Stochastic Differential Equations

4 Outubro 2022, 11:30 João Guerra

Deterministic differential equations: examples.

Stochastic Differential Equations: definitions and examples. 
Existence and uniqueness of solutions. Example of explosion of a solution in finite time. 
The geometric Brownian motion SDE. Two different methods for obtaining the solution. 
How to solve the Langevin or Ornstein-Uhlenbeck SDE. 


Itô Formula

29 Setembro 2022, 11:30 João Guerra

Itô Formula: motivation. 

Itô processes: definition. 
One-dimensional Itô formula: different versions and examples. 
Multidimensional Itô formula. 


Stochastic Integrals

27 Setembro 2022, 11:30 João Guerra

Simple processes. Definition and example. 

Stochastic integral of simple processes. Definition and properties. Example. 
Stochastic integral of adapted processes. Definition and properties. Example. 


Martingales

23 Setembro 2022, 12:00 João Guerra

Martingales in Discrete time and in continuous time.

Definition, properties and examples. 


Geometric Brownian motion. Martingales in discrete time

20 Setembro 2022, 11:30 João Guerra

Correlated Brownian motion.

Geometric Brownian motion: definition, 
Properties and simulation of trajectories using R 
and the package SDE.
Conditional expectation: definition and properties.
Filtration and martingale in discrete time: definition, 
properties and examples.