title: Difference of cross-spectral densities.
abstract: Generally speaking, the difference between two cross-spectral densities (CSDs) does not represent a correlation function. We will furnish a sufficient condition so that such difference be a valid CSD. Using such a condition, we will show through some examples how new classes of CSDs can be generated.
authors.forename: M
authors.initials: M
authors.lastname: Santarsiero
authors.forename: G
authors.initials: G
authors.lastname: Piquero
authors.forename: J C G
authors.initials: JC
authors.lastname: de Sande
authors.forename: F
authors.initials: F
authors.lastname: Gori