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From: Tim Wescott on 18 Jan 2010 10:29
On Mon, 18 Jan 2010 01:26:07 -0600, hyeewang wrote:

> 1.If signal in time domain is infinite ,it must be finite in frequency
> domain, vice versa.
>
> 2.If signal in time domain is infinite, it must be infinite in frequency
> domain,vice versa.
>
> How to prove them? Which articles/textbooks implemented that? Do not
> just give a example to deduct them,I require a proof of theory.
>
> cheers

Try:

1: If a signal is of finite extent in the time domain, then it must be
of infinite extent in the frequency domain.

2: If a signal is of finite extent in the frequency domain, etc.

See if that lasts a bit longer in the "a single case disproven disproves
the whole" mill.

--
www.wescottdesign.com
From: dvsarwate on 19 Jan 2010 22:13
On Jan 19, 2:41 pm, dvsarwate <dvsarw...(a)gmail.com> wrote:

>
> is false, as Tim Westcott's example shows:
>

My apologies to Tim Wescott for borrowing his
example and attributing it to someone else.

--Dilip Sarwate

From: Tim Wescott on 19 Jan 2010 23:16
On Tue, 19 Jan 2010 19:13:56 -0800, dvsarwate wrote:

> On Jan 19, 2:41 pm, dvsarwate <dvsarw...(a)gmail.com> wrote:
>
>
>> is false, as Tim Westcott's example shows:
>>
>>
> My apologies to Tim Wescott for borrowing his example and attributing it
> to someone else.
>
> --Dilip Sarwate

:-)

It's amazing how such a simple name can be misspelled in so many ways.

Wescott (correct, but probably not original)
Westcott (correct if you're one of 'them', probably the original but
unrefined spelling)
Westcot (what happens when I say "with two 't's", but also a known
variant)
Wescottt (what happens when one of them says "with three 't's")
Wescit (another known variant)
Wescot (what happens when I say "with no 't' in the middle")
Westcot (what happens when one of them says "with a 't' in the middle")

There's more, but I can't remember all of them.

These days if I'm telling someone my name, I just spell it out...

--
www.wescottdesign.com
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