Editing Conull set

In [[measure theory]], a '''conull set''' is a set whose [[complement (set theory)|complement]] is [[null set|null]], i.e., the [[measure (mathematics)|measure]] of the complement is zero.<ref>{{citation
 | last = Führ | first = Hartmut
 | isbn = 3-540-24259-7
 | mr = 2130226
 | page = 12
 | publisher = Springer-Verlag, Berlin
 | series = Lecture Notes in Mathematics
 | title = Abstract harmonic analysis of continuous wavelet transforms
 | url = https://books.google.com/books?id=ERlIzB67I9kC&pg=PA12
 | volume = 1863
 | year = 2005}}.</ref> For example, the set of [[irrational number]]s is a conull [[subset]] of the [[real line]] with [[Lebesgue measure]].<ref>A related but slightly more complex example is given by Führ, p.&nbsp;143.</ref>

A property that is true of the elements of a conull set is said to be true [[almost everywhere]].<ref>{{citation
 | last = Bezuglyi | first = Sergey
 | contribution = Groups of automorphisms of a measure space and weak equivalence of cocycles
 | mr = 1774424
 | pages = 59–86
 | publisher = Cambridge Univ. Press, Cambridge
 | series = London Math. Soc. Lecture Note Ser.
 | title = Descriptive set theory and dynamical systems (Marseille-Luminy, 1996)
 | volume = 277
 | year = 2000}}. See [https://books.google.com/books?id=g64TCEiYULAC&pg=PA62 p.&nbsp;62] for an example of this usage.</ref>

==References==
{{reflist}}

[[Category:Measure theory]]


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