MathGroup Archive 1993

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replacement rules and a simple list

  • To: mathgroup at
  • Subject: replacement rules and a simple list
  • From: koleh%joyl.dnet at
  • Date: Thu, 25 Feb 1993 09:46:50 +0300

Leon Poon asks if there is an easy way to turn the solutions of 
a Solve from a list of replacement rules to simply elements of 
a list. I think the following rule is very simple.

In[1]:= replace[{a_ -> b_}] := Replace[{a -> b}, {a -> b} -> b]

In[2]:= Solve[x^4==1,x]

Out[2]= {{x -> 1}, {x -> I}, {x -> -1}, {x -> -I}}

In[3]:= Map[replace,%]

Out[3]= {1, I, -1, -I}

Osmo Kolehmainen 

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