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invariant

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invariant

 

  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Invariant  \In*va"ri*ant\,  n.  (Math.) 
  An  invariable  quantity;  specifically,  a  function  of  the 
  coefficients  of  one  or  more  forms,  which  remains  unaltered, 
  when  these  undergo  suitable  linear  transformations.  --J.  J. 
  Sylvester. 
 
  From  WordNet  r  1.6  [wn]: 
 
  invariant 
  adj  1:  (mathematics)  unaffected  by  a  designated  operation  or 
  transformation 
  2:  persistent  in  occurrence  and  unvarying  in  nature; 
  "maintained  a  constant  temperature";  "a  constant  beat"; 
  "principles  of  unvarying  validity";  "a  steady  breeze" 
  [syn:  {changeless},  {constant},  {steady},  {unvarying}] 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  invariant 
 
    A  rule  such  as  the  {ordering}  of  an  ordered 
  list  or  {heap},  that  applies  throughout  the  life  of  a  data 
  structure  or  procedure.  Each  change  to  the  data  structure 
  must  maintain  the  correctness  of  the  invariant. 
 
  (1996-03-12)




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