Editing Almost all (section)

===Meaning in algebra===
In [[abstract algebra]] and [[mathematical logic]], if <var>U</var> is an [[Ultrafilter#Special case: ultrafilter on the powerset of a set|ultrafilter]] on a set <var>X,</var> "almost all elements of <var>X</var>" sometimes means "the elements of some ''element'' of <var>U</var>".{{r|Komjath|Salzmann|Schoutens|Rautenberg}} For any [[Partition of a set|partition]] of <var>X</var> into two [[disjoint sets]], one of them will necessarily contain almost all elements of <var>X.</var> It is possible to think of the elements of a [[Filter (set theory)|filter]] on <var>X</var> as containing almost all elements of <var>X</var>, even if it isn't an ultrafilter.{{r|Rautenberg}}