Semigroup theory applied to options

[摘要] Black and Scholes (1973) proved that under certain assumptions about the market place, the value of a European option, as afunction of the current value of the underlying asset and time, verifies a Cauchy problem. We give new conditions for the existence and uniqueness of the value of a European option by using semigroup theory. For this, we choose a suitable space that verifies some conditions, what allows us that the operator that appears in the Cauchy problem is the infinitesimal generator of aC0-semigroupT(t). Then we are able to guarantee the existence and uniqueness of the value of a European option and we also achieve an explicit expression of that value.

[学科分类] 应用数学