Loss function

in mathematical optimization, a function (to be minimized) representing the cost of each outcome
(Redirected from Cost function)

In mathematics a loss function or cost function is a mathematical function that maps an event, or the values of one or more variables onto a real number. This number is then given a semantic value, such as cost or utility. Optimisation can then be used to find the value where the function is minimal, or at one of its maxima.