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MathGroup Archive 1992

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Why does this crash the kernel?

  • To: mathgroup at yoda.physics.unc.edu
  • Subject: Why does this crash the kernel?
  • From: fink at acf5.nyu.edu (Howard Fink)
  • Date: Wed, 22 Jul 92 14:26:56 -0400

The following file crashes a sun kernel and a mac kernel.
The sun kernel returns a bus error or memory error.
The mac kernel returns a type 1 error.
b1 = Sqrt[2] x (500000 - 375 2^(5/2) x + 2 x^2 - 1000 p + 
1.5 Sqrt[2] x p + 0.5 p^2)/(1000 - Sqrt[2] x - p);

a1 = (500000 - 125 2^(7/2) x + x^2 - 2000 p + 2^(3/2) x p + 
1.5 p^2)/(1000 - Sqrt[2] x - p);

e = 0.125 b1^2  - 0.125 a1^2;
kk = Simplify[e/.p->190];

Solve[kk==0,x]
__________________________________the end___________________________
Everything works fine until Solve.
Mathematica 2.03 on Sun 4 and Mac IIci.  The memory meter on the mac
barely budges before the crash. 

Any workarounds?


Howard Fink





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