strange behavior or bug on ode2

• Subject: strange behavior or bug on ode2
• From: Barton Willis
• Date: Tue, 9 Nov 2004 18:50:06 -0600

For e = (sqrt(3) - 2)/2 * x, we have

   (mminusp* e) ==> true  AND
   (mminusp* (neg e)) ==> true.

The simp-%cos hack

 (and ($trigsign (mminusp* y) (not (mminusp* (neg y))) ..

stops the infinite loop.  But mminusp* needs to be more
conservative about returning true.

Barton

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