This is a preview. Log in through your library . Abstract Dans cette communication l'auteur examine quelques problèmes fondamentaux dans la théorie des relations entre des variables stochastiques. La ...

Stochastic volatility is the unpredictable nature of asset price volatility over time. It's a flexible alternative to the Black Scholes' constant volatility assumption.

Increasing evidence has emerged for non-random spatial distributions of microbes, but knowledge of the processes that cause variation in microbial assemblage among ecosystems is lacking. For instance, ...