Sumários
15 Outubro 2025, 14:00
•
João Guerra
Finite variation functions and finite variation processes. Examples.
When Lévy processes have finite variation.
Finite and infinite activity processes.
Lévy-Itô decomposition.
The simulation of Lévy processes.
Simulation of Brownian motion and of Poisson processes.
The general method of simulation for Lévy processes.
14 Outubro 2025, 09:30
•
João Guerra
Poisson random measures. Definition, properties and examples.
Poisson integrals and compensated Poisson integrals. Definition, properties and examples.
Discussion of problems related to subordinators and martingales.
8 Outubro 2025, 14:00
•
João Guerra
Subordinators and its application in time change. Example: Variance-Gamma process.
Discussion of exercises.
Poisson random measures.
7 Outubro 2025, 09:30
•
João Guerra
Lévy processes: Stable Lévy processes, rotationally invariant stable Lévy processes.
Subordinator processes: definition and properties.
Characteristic exponent and Laplace exponent of a subordinator.
Examples of subordinators: Poisson process, Compound Poisson with jumps of positive size, stable subordinators, Gamma subordinator.
Subordinators and time change in Lévy processes: example.
1 Outubro 2025, 14:00
•
João Guerra
Lévy-Khintchine formula.
Characteristic exponent for different distributions.
Lévy processes characteristic exponent and Lévy characteristics triplet. Examples: Brownian motion with drift, Poisson process, Compound Poisson process.