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MathGroup Archive 2011

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what's wrong?!!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115651] what's wrong?!!
  • From: olfa <olfa.mraihi at yahoo.fr>
  • Date: Mon, 17 Jan 2011 05:40:38 -0500 (EST)

Hi Mathematica community,

I try to use Case[exp,patt,Infinity]

for the first example it works:
Cases[iP == i + v && kaP == 3^v,  iP == _ | kaP == _, Infinity]
the output is  {iP == i + v, kaP == 3^v}

but not for the second one!!
 Cases[yP == y + x - z, yP == _, Infinity]
the output is  {}

why?!!

Thank you.


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