Les opérateurs integraux dont le noyau est une covariance.
In many fields: signal theory, economics, etc... where random functions are introduced, frequently and naturally we encounter integral operators whose kernels are covariances. Of course the most immediate properties of that particular kind of integral operators have already been published, this allows us to quote them without proofs. But these properties are scattered over, so we have thought useful to present here a synthetic ordered, almost full account of them without pretending to originality,...