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XI

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Xi (upper case Ξ, lower case ξ) is the 14th letter of the Greek alphabet. In the system of Greek numerals it has a value of 60.

The lower-case letter ξ is used as a symbol for:

  • Random Variables
  • Extent of Reaction (a topic in chemical engineering)

    The upper-case letter Ξ is used as symbol for:

  • The 'cascade particles' in particle physics.



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