Fourier and 0 and N
- To: mathgroup at smc.vnet.net
- Subject: [mg4931] Fourier and 0 and N
- From: Michael Schaferkotter <schaferk at tennessee.nrlssc.navy.mil>
- Date: Fri, 4 Oct 1996 00:17:59 -0400
- Organization: sverdrup technology inc.
- Sender: owner-wri-mathgroup at wolfram.com
greetings:
as most know, Fourier requires a numerical argument.
Fourier[{1,1}] simply returns itself.
However
Fourier[N[{1,1}]] returns
{1.41421 + 0. I, 0. + 0. I}.
Now
Fourier[{0,0}] returns itself, as above
however
Fourier[N{0,0}]] also returns itself.
but
Fourier[{0.0,0.0}] returns
{0. + 0. I, 0. + 0. I}
the behaviour of Fourier[N{0,0}] does not seem to be expected.
is there something about 0 here that i am not understanding?
this came up using Chop and Fourier.
also
please explain
Sqrt[2] > 2 returns
Sqrt[2] > 2
while
Sqrt[0] > 0 returns
False.
sincerely,
m. r.
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