J (disambiguation)

J, or j, is the tenth letter of the English alphabet.

J may also refer to:

Astronomy

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Computing

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Genetics and medicine

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Mathematics

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  • J, symbol used to denote the Bessel function
  • j, used as the symbol for the imaginary unit () in fields where i is used for a different purpose (such as electric current)
  • j and j2 (or ) are also used for the complex cube roots of unity
  • j, a number with the property j 2 = +1, used in the definition of the split-complex numbers
  • j, the second imaginary unit of a quaternion
  • j, an index variable in a matrix
  • The j-invariant, a modular function

Physics and chemistry

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Music

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Albums

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Songs

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Film and television

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Writers

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Transportation

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Other uses

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See also

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