This article provides a contribution to the search for a stochastic model to describe the evolution of the prices of stocks and similar variables that matches the option prices observable on the market and their dynamics. ...

In this paper we introduce an option pricing model with stocha- stic volatility which can be made to exactly match a given arbitrage free implied volatility surface (IVF). The dynamics of the IVF implied by the model - ...

In the two envelope problem, unconditionally switching to the second envelope does not improve chances compared to the pure strategy of keeping the first one. But the amount of money to be won can be notably increased by ...

Es werden das Nimspiel, ein EDV-Trick und ein Problem zu den natürlichen Zahlen vorgestellt. Dann werden die Problemstellungen gelöst und es wird gezeigt, dass für alle drei Phänomene die gleiche algebraische Struktur ...