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Re: Chop in Mathematica 8.0.1

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  • Subject: [mg117562] Re: Chop in Mathematica 8.0.1
  • From: Dana DeLouis <dana.del at gmail.com>
  • Date: Tue, 22 Mar 2011 05:16:34 -0500 (EST)

>  f[a_] := 2 I Pi Sin[a]/a

Hi.  I don't have a solution to the question, but this may work better at 0.

g[a_]:=2 I Pi Sinc[a]

g[0.]
0.\[VeryThinSpace]+6.283 I

vs.  Power::infy:

f[0.]
Power::infy: Infinite expression 1/0. encountered.

= = = = = = = = = =
HTH  : >)
Dana DeLouis



Chop does not seem to work properly in Mathematica 8.0.1:
f[a_] := 2 I Pi Sin[a]/a

In[2]:= f[1.]

Out[2]= 0. + 5.287118128162912*I

In[3]:= Chop[%]

Out[3]= 0. + 5.287118128162912*I

This is with

In[4]:= $Version

Out[4]= 8.0 for Mac OS X x86 (64-bit) (February 23, 2011)

 Mathematica 7.01 returns 5.287118128162912*I as expected.

Can anyone confirm it? At the moment I can't see any simple work around...

Andrzej Kozlowski




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