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Category theory is a general theory of mathematical structures and their relations. It was introduced by Samuel Eilenberg and Saunders Mac Lane in the...

A glider is a fixed-wing aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does...

In estimation theory and decision theory, a Bayes estimator or a Bayes action is an estimator or decision rule that minimizes the posterior expected value...

Shock resistant is a common mark stamped on the back of wrist watches to indicate how well a watch copes with mechanical shocks. In a mechanical watch...

In statistics, count data is a statistical data type describing countable quantities, data which can take only the counting numbers, non-negative integer...

In mathematics, particularly in linear algebra, a skew-symmetric (or antisymmetric or antimetric) matrix is a square matrix whose transpose equals its...

In radio communication, multipath is the propagation phenomenon that results in radio signals reaching the receiving antenna by two or more paths. Causes...

A monoscope was a special form of video camera tube which displayed a single still video image. The image was built into the tube, hence the name. The...

In probability theory, the Borel–Cantelli lemma is a theorem about sequences of events. In general, it is a result in measure theory. It is named after...

PostScript fonts are font files encoded in outline font specifications developed by Adobe Systems for professional digital typesetting. This system uses...

Balmer is the lava-flooded remains of a lunar impact crater. Only the heavily worn southern and eastern sections of the crater still survive; the remainder...

The Plymouth Savoy is an automobile model produced from the 1954 through 1964 model years by Plymouth. Plymouth used the name Savoy on several automobiles...

The Beechcraft XA-38 "Grizzly" was a World War II-era ground attack aircraft, developed by Beechcraft, but never put into production. The Grizzly was to...

Look up torsion in Wiktionary, the free dictionary. Torsion is a gastropod synapomorphy which occurs in all gastropods during larval development. Torsion...

Microbiotheria is an australidelphian marsupial order that encompasses two families, Microbiotheriidae and Woodburnodontidae, and is represented by only...

Jean Baptiste Joseph, chevalier Delambre (19 September 1749 – 19 August 1822) was a French mathematician, astronomer, historian of astronomy, and geodesist...

The Nyika climbing mouse (Dendromus nyikae) is a species of rodent in the family Nesomyidae. It is found in Angola, Democratic Republic of the Congo, Malawi...

eDirectory is an X.500-compatible directory service software product from NetIQ. Previously owned by Novell, the product has also been known as Novell...

Friedrich Robert Helmert (31 July 1843 – 15 June 1917) was a German geodesist and statistician with important contributions to the theory of errors. Helmert...

Trinidad and Tobago has a number of dams and reservoirs. Reservoirs were constructed to supply potable water and are managed by the Water and Sewerage...