Xi

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

Related Topics:
Greek alphabet - Greeks - Greek numerals

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

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• Random Variables
• Extent of Reaction (a topic found most often in chemical engineering kinetics)

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

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• The 'cascade particles' in particle physics.