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MathGroup Archive 2003

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Re: ProductLog[-Pi/2]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg44209] Re: ProductLog[-Pi/2]
  • From: Paul Abbott <paul at physics.uwa.edu.au>
  • Date: Tue, 28 Oct 2003 05:53:15 -0500 (EST)
  • Organization: The University of Western Australia
  • References: <bnapg7$4lk$1@smc.vnet.net> <bndk8u$g5m$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <bndk8u$g5m$1 at smc.vnet.net>,
 "Christos Argyropoulos M.D." <argchris at otenet.gr> wrote:

> Actually this is the expected behaviour;

Why?

> You entered an exact number in the ProductLog function, and you get back an
> exact number (i.e. ProductLog[Pi/2])

But surely, for ProductLog[-Pi/2], Mathematica could give the _exact_ 
result I Pi/2, just as it does for, say ArcTan[Sqrt[3]] or Sin[Pi/12]

> Mathematica will keep this special function result in this exact format,
> unless requested to return a numeric result.

Or give an exact result, when possible (or sufficiently simple).

Cheers,
Paul

-- 
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