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wigglesmore about wiggles

wiggles


  2  definitions  found 
 
  From  Jargon  File  (4.2.3,  23  NOV  2000)  [jargon]: 
 
  wiggles  n.  [scientific  computation]  In  solving  partial 
  differential  equations  by  finite  difference  and  similar  methods,  wiggles 
  are  sawtooth  (up-down-up-down)  oscillations  at  the  shortest  wavelength 
  representable  on  the  grid.  If  an  algorithm  is  unstable,  this  is  often 
  the  most  unstable  waveform,  so  it  grows  to  dominate  the  solution. 
  Alternatively,  stable  (though  inaccurate)  wiggles  can  be  generated  near 
  a  discontinuity  by  a  Gibbs  phenomenon. 
 
 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  wiggles 
 
  [scientific  computation]  In  solving  partial  differential 
  equations  by  finite  difference  and  similar  methods,  wiggles 
  are  sawtooth  (up-down-up-down)  oscillations  at  the  shortest 
  wavelength  representable  on  the  grid.  If  an  algorithm  is 
  unstable,  this  is  often  the  most  unstable  waveform,  so  it 
  grows  to  dominate  the  solution.  Alternatively,  stable  (though 
  inaccurate)  wiggles  can  be  generated  near  a  discontinuity  by  a 
  Gibbs  phenomenon. 
 
 




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