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Kronecker delta. In mathematics, the Kronecker delta (named after Leopold Kronecker) is a function of two variables, usually just non-negative integers. The function is 1 if the variables are equal, and 0 otherwise: or with use of Iverson brackets : For example, because , whereas because . The Kronecker delta appears naturally in many areas of ...
A delta wing is a wing shaped in the form of a triangle. It is named for its similarity in shape to the Greek uppercase letter delta (Δ). Although long studied, it did not find significant applications until the Jet Age, when it proved suitable for high-speed subsonic and supersonic flight.
The Delta rocket family was a versatile range of American rocket -powered expendable launch systems that provided space launch capability in the United States from 1960 to 2024. Japan also launched license-built derivatives ( N-I, N-II, and H-I) from 1975 to 1992. More than 300 Delta rockets were launched with a 95% success rate.
Colt Delta Elite. The Colt Delta Elite is a modified series 80 M1911 pistol chambered for the 10mm Auto cartridge. It was first introduced in 1987 by the Colt's Manufacturing Company. [1] The Delta Elite is credited as being the first firearm produced by a major manufacturer to chamber the 10mm.
Delta Dawn. " Delta Dawn " is a song written by musician Larry Collins and country songwriter Alex Harvey. [a] The first notable recording of the song was in 1971 by American singer and actress Bette Midler for her debut album. However it is best known as a 1972 top ten country hit for Tanya Tucker [1] and a 1973 US number one hit for Helen Reddy .
Typical region in the Okavango Delta, with free canals and lakes, swamps and islands. The Okavango Delta [2] (or Okavango Grassland; formerly spelled "Okovango" or "Okovanggo") in Botswana is a vast inland delta formed where the Okavango River reaches a tectonic trough at an altitude of 930–1,000 m [3] in the central part of the endorheic ...
Delta bond. In chemistry, delta bonds ( δ bonds) are covalent chemical bonds, where four lobes of one involved atomic orbital overlap four lobes of the other involved atomic orbital. This overlap leads to the formation of a bonding molecular orbital with two nodal planes which contain the internuclear axis and go through both atoms.
The Delta IV Heavy ( Delta 9250H) was an expendable heavy-lift launch vehicle, the largest type of the Delta IV family. It was the world's third highest-capacity launch vehicle in operation at the time of its retirement in 2024, behind NASA 's Space Launch System and SpaceX 's Falcon Heavy and closely followed by CASC 's Long March 5. [5] [6 ...
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