Doublet
Encyclopedia
Doublet may refer to:
- Doublet (clothing)Doublet (clothing)A doublet is a man's snug-fitting buttoned jacket that is fitted and shaped to the man's body which was worn in Western Europe from the Middle Ages through to the mid-17th century. The doublet was hip length or waist length and worn over the shirt or drawers. Until the end of the 15th century the...
, a man's snug-fitting buttoned jacket that was worn from the late 14th century to the mid 17th century - Doublet (lapidary)Doublet (lapidary)A doublet is a type of gem composed in two sections. It is sometimes used to imitate other, more expensive gems.A garnet and glass doublet uses a top portion of natural garnet fused to any color of glass to imitate a gem. The color of glass used in the doublet is all that is seen, as the garnet...
, an assembled gem composed in two sections, such as a garnet overlaying green glass - Doublet (lens)Doublet (lens)In optics, a doublet is a type of lens made up of two simple lenses paired together. Such an arrangement allows more optical surfaces, thicknesses, and formulations, especially as the space between lenses may be considered an "element." With additional degrees of freedom, optical designers have...
, a type of lens, made up of two stacked layers with different refractive indices - Doublet (linguistics)Doublet (linguistics)In etymology, two or more words in the same language are called doublets or etymological twins when they have different phonological forms but the same etymological root. Often, but not always, the variants have entered the language through different routes...
, one of two or more words of the same language that come from the same root - Doublet (physics)Doublet (physics)In quantum mechanics, a doublet is a quantum state of a system with a spin of 1/2, such that there are two allowed values of the spin component, −1/2 and +1/2. Quantum systems with two possible states are sometimes called two-level systems...
, a quantum state of a system with a spin of ½ - Doublet (potential flow), fluid flow due to a source–sink combination
- Pierre Jean Louis Ovide DoubletPierre Jean Louis Ovide DoubletPierre Jean Louis Ovide Doublet was a French politician and writer.The majority of his working life was devoted to the service of the Grand Master of the Order of Malta. Following the demise of the Order in Malta, he was appointed Secretary General to the Commission of Government and later became...
(1749–1824), a politician and writer from France - Word ladderWord ladderA Word Ladder is a word game invented by Lewis Carroll. A word ladder puzzle begins with two words, and to solve the puzzle one must find a chain of other words, where at each step the words differ by altering a single letter.-History:Lewis Carroll says that he invented the game on Christmas day...
or "doublets", a word game invented by Lewis Carroll - In mathematics, the unit doubletUnit doubletIn mathematics, the unit doublet is the derivative of the Dirac delta function. It can be used to differentiate signals in electrical engineering: If u1 is the unit doublet, thenwhere * refers to the convolution operator....
is the derivativeDerivativeIn calculus, a branch of mathematics, the derivative is a measure of how a function changes as its input changes. Loosely speaking, a derivative can be thought of as how much one quantity is changing in response to changes in some other quantity; for example, the derivative of the position of a...
of the Dirac delta functionDirac delta functionThe Dirac delta function, or δ function, is a generalized function depending on a real parameter such that it is zero for all values of the parameter except when the parameter is zero, and its integral over the parameter from −∞ to ∞ is equal to one. It was introduced by theoretical... - In textual criticismTextual criticismTextual criticism is a branch of literary criticism that is concerned with the identification and removal of transcription errors in the texts of manuscripts...
, two different narrative accounts of the same actual event - Dimeresia howelliiDimeresiaDimeresia is a monotypic genus in the sunflower family containing the single species Dimeresia howellii, which is known by the common name doublet. The doublet is a very tiny annual flowering plant rarely exceeding 4 centimeters in height or width...
, a tiny flowering plant.