permanent

  1. Adjective.  Without end, eternal.
  2. Adjective.  Lasting for an indefinitely long time.
  3. Noun.  (colloquial) A chemical hair treatment imparting or removing curliness, whose effects typically last for a period of weeks.
  4. Noun.  (linear algebra, combinatorics) Given an n imes n matrix a_{ij} ,, the sum over all permutations pi , of prod_{i=1}^n(a_{ipi(i)) .

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This entry was last updated on RefTopia from its source on 3/20/2012.