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extremal

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ex⋅tre⋅mal

[ik-stree-muhl]
–adjective Mathematics.
of or pertaining to an extremum or the calculation of extrema: an extremal problem.

Origin:
1400–50; late ME. See extrem(um), -al 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ex·trem·al   (ĭk-strē'məl)   
adj.  
  1. Mathematics Of or relating to maximal or minimal values or degrees of inclusiveness.

  2. Having or characterized by extreme properties or conditions: an extremal black hole.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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