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MathGroup Archive 1994

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Re: Question about Cases command.

  • To: mathgroup at
  • Subject: Re: Question about Cases command.
  • From: Count Dracula <lk3a at>
  • Date: Tue, 28 Jun 1994 14:10:32 -0400

I there is a syntax problem in your input:

Mathematica 2.2 for IBM RISC System/6000
Copyright 1988-93 Wolfram Research, Inc.
 -- Motif graphics initialized -- 

In[1]:= list={Derivative[1,2][a][x,y], Derivative[1,1][b][x,y]};

In[2]:= Cases[list, Derivative[__][a][__]]

Out[2]= {a     [x, y]}

and Cases works as you would expect.

  Levent Kitis                                                 
  Department of Mechanical, Aerospace and Nuclear Engineering  
  Thornton Hall  McCormick Road
  University of Virginia                                       
  Charlottesville, Virginia 22903  USA                         
  804-924-6230      lk3a at              
  804-924-3291      lk3a at

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