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** The Lebesgue measure of a countable disjoint union of measurable sets is equal to the sum of the measures of the individual sets.
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** and Lebesgue
** The Vitali theorem on the existence of non-measurable sets which states that there is a subset of the real numbers that is not Lebesgue measurable.
** Lebesgue covering dimension, a definition of dimension using topological properties
** Lebesgue covering dimension
** and measure
** Index of dispersion, a normalized measure of the dispersion of a probability distribution
** Ionic radius, a measure of the size of an ion in a crystal lattice
** Software metrics, a measure of some property of a piece of software or its specifications
** Performance metrics, a measure of an organization's activities and performance.
** Metric tensor, in mathematics, a symmetric rank-2 tensor, used to measure length and angle
** In genomics, as a measure of evolution at the protein level ( also denoted as d < sub > N </ sub >/ d < sub > S </ sub > or K < sub > a </ sub >/ K < sub > s </ sub > ratio ).
** Reduction potential, a measure of the tendency of a chemical species to acquire electrons
** London Road Safety Unit, which promotes safer roads through advertising and road safety measure.
** Phylogenetic diversity, a measure of biodiversity which incorporates phylogenetic difference between species
** measure words
** Gas meter, a device to measure consumption of combustible gas
** proxy-detection: in-vehicle sensors measure leaf status ; this requires the farmer to drive around the entire field.
** Rack unit, equipment sizing measure
** Static port, a sensor used on aircraft to measure static pressure
** Functional magnetic resonance imaging ( fMRI ), an MRI technique to measure brain activity
** Magnetic resonance elastography ( MRE ), an MRI technique to measure tissue stiffness
** Languages of both the CJKV area and both mainland and island Southeast Asia typically have a well-developed system of measure words or numerical classifiers.
** In network engineering, access to resources formally rated by a fairness measure
** In some parts of the UK, a popular variant is the " lager top ", in which a small measure of clear lemonade or lime juice is added to the lager — usually about an inch.
** Interferometers – measure line integrated plasma density
** measure ( mathematics ), a systematic way to assign to each suitable subset a number
** cardinality ( equal if there is a bijection ), of a set is a measure of the " number of elements of the set "
** the measure of bond-tightness between an enzyme and a corresponding enzyme inhibitor
** Program state, in computer science, a snapshot of the measure of various conditions in the system
** and countable
** Any union of countably many countable sets is itself countable.
** is closed under countable unions: if A < sub > i </ sub >∈ for i = 1, 2 ,…, then also (∪< sub > i </ sub > A < sub > i </ sub >)∈
** Sigma algebra: a collection of sets closed under countable unions and complementation
** and disjoint
** Anders Johansson, Jeff Kahn, and Van H. Vu for determining the threshold of edge density above which a random graph can be covered by disjoint copies of a given smaller graph.
** Connected space, a topological space which cannot be written as the disjoint union of two or more nonempty open spaces
** and union
** El Salvador Customs union, ( 1963, re-launched on October 29, 1993 )
** Guatemala Customs union, ( 1963, re-launched on October 29, 1993 )
** Honduras Customs union, ( 1963, re-launched on October 29, 1993 )
** Nicaragua Customs union, ( 1963, re-launched on October 29, 1993 )
** The rimbases are short broad rings located at the union of the trunnions and the cannon which provide support to the carriage attachment.
** Canterbury Rugby Football Union, the governing body for rugby union in the central Canterbury region
** Sébastien Chabal, French rugby union player
** 20, 000 London policemen strike for increased pay and union recognition.
** Iceland regains independence, yet remains in personal union with the King of Denmark, who also becomes the King of Iceland until 1944.
** The Parliament of Finland again declares itself holder of sovereignty, effectively dissolving the 108-year-old union with Russia.
** The British miners ' union begins negotiations with the government
** After weeks of strikes at the Lenin Shipyard in Gdańsk, Poland, the nationwide independent trade union Solidarity is established.
** The United Methodist Church is created by the union of the former Methodist and Evangelical United Brethren churches.
** The constitutional union between Indonesia and the Netherlands is dissolved.
** Douglas Fraser, Scottish-born union leader ( d. 2008 )
** The union of Nicaragua, Honduras and El Salvador begins ( ends in 1898 ).
** The legislative union of Great Britain and Ireland is completed under the Act of Union 1800, bringing about the United Kingdom of Great Britain and Ireland.
** Teddy Wakelam, English sports broadcaster and rugby union player ( d. 1963 )
** Damien Frawley, Australian rugby union player
** John Smit, South African rugby union player
** Jason White, Scottish rugby union player
** Kevin Senio, New Zealand rugby union footballer
** Marko Stanojevic, English-born Italian rugby union player
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