Translate covarianza from Spanish to English

– A statistical measure of the tendency of two variables to change in conjunction with each other. It is equal to the product of their standard deviations and correlation coefficients. ¹

– In programming languages, the ability to use a more derived type than that originally specified. Covariance in generic interfaces and delegates allows for implicit conversion of generic type parameters. Covariance is also supported for non-generic delegates for matching method signatures with delegate types. ¹