What is Loss function?
In [[mathematics]] a '''loss function''' or '''cost function''' is a [[function (mathematics)|mathematical function]] that maps an event, or the values of one or more variables onto a [[real number]]. This number is then given a [[semantics|semantic]] value, such as cost or [[utility]]. [[Mathematical optimization|Optimisation]] can then be used to find the value where the function is minimal, or at one of its maxima. {{math-stub}} {{statistics}} [[Category:Functions and mappings]]