The Fox (What Does the Fox Say?) did not know about its existence when producing "The Fox". Like many viral music videos, "The Fox" has become an Internet meme and has been extensively covered and adapted by others, with some of the most prominent being a cover by The Ohio University Marching 110 who had previously covered "Gangnam Style" and LMFAO's "Party Rock Anthem"; a cover by Tay Zonday of "Chocolate Rain"; an acoustic guitar cover of the first verse by Tyler Ward; an adaptation based on the popular video game "League of Legends" entitled "What Does Teemo Say?"; and an adaptation by Annoying Orange entitled "The
Pre-measure is called "σ"-additivity. Thus, what is missing for a pre-measure to be a measure is that it is not necessarily defined on a sigma-algebra (or a sigma-ring). It turns out that pre-measures give rise quite naturally to outer measures, which are defined for all subsets of the space "X". More precisely, if "μ" is a pre-measure defined on a ring of subsets "R" of the space "X", then the set function "μ" defined by is an outer measure on "X" and the measure "μ" induced by "μ" on the σ-algebra Σ of Carathéodory-measurable sets satisfies formula_4 for formula_5 (in particular,