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MathGroup Archive 1997

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Mma 3.0 and BetaRegularized

  • To: mathgroup at smc.vnet.net
  • Subject: [mg8743] Mma 3.0 and BetaRegularized
  • From: John Persons <jp+ at osu.edu>
  • Date: Sat, 20 Sep 1997 22:28:09 -0400
  • Organization: Ohio State University
  • Sender: owner-wri-mathgroup at wolfram.com

BetaRegularized[q,2,2] is (3-2q)q^2, which is zero only at q=0 and
q=2/3.

So why does Mma 3.0 (Windows 95) give me this:

In[21]:= Clear[q]
In[22]:= FullSimplify[BetaRegularized[q,2,2]]
Out[22]= 0

even though Mma knows it is not zero:

In[23]:= N[BetaRegularized[1/2,2,2]]
Out[23]= 0.5

This kind of crap drives me nuts!
-- 
                                  John Persons
                                  jp+ at osu.edu


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