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GeezerVison is showing mathworld.wolfram.com — Set Extension -- from Wolfram MathWorld

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Set Extension

The definition of a set by enumerating its members. An extensional definition can always be reduced to an intentional one.

An extension field is sometimes also called simply an extension.

See also

Extension Field, Intension

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More things to try:

  • 1/4 + 2/3
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References

Russell, B. "Definition of Number." Introduction to Mathematical Philosophy. New York: Simon and Schuster, 1971.

Referenced on Wolfram|Alpha

Set Extension

Cite this as:

Weisstein, Eric W. "Set Extension." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/SetExtension.html

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