Editing Extreme value theory (section)

==Univariate theory==
{{main|Fisher–Tippett–Gnedenko theorem|l1=Extreme value theorem}}
The theory for extreme values of a single variable is governed by the ''[[Fisher–Tippett–Gnedenko theorem|extreme value theorem]]'', also called the ''[[Fisher–Tippett–Gnedenko theorem]]'', which describes which of the three possible distributions for extreme values applies for a particular statistical variable <math>X</math>.