### Will Harwood (@LM741)

Computer Scientist and Software Engineering professional with particular interests in formal methods and computer security. PH. D. in computer science entitled "The Logic of Trust". Semi-retired. Last full time post CTO of Silicon Safe Ltd. Currently visiting research fellow at the University of York department of computer science. Original degree "Computing and Cybernetics". Current interests in mixed signal processing techniques for audio and ultrasonic (think Bats!).

## Re: math/money reasoning issue, Not a spam Please

No - all the debts in the loop cancel out with or without the £50 note. All the £50 note does is act as a token that circulates and ‘clears’ the accounting....

## Re: correlation of two complex signals

I am by far from being an expert in this, but does Matlab correlation take the complex conjugate of the second signal before applying the correlation?

## Re: Real Numbers

With reference to ‘seems’: In an earlier reply to me you referred to a ‘counter example’ posted below, which strongly suggests that you intend this to be...

## Re: Real Numbers

In essence you are confusing two different notions - the number and the representation of the number. 0.999999... and 0.100000 are different representations of the...

## Re: Real Numbers

But if this is meant to be a counter example then do exactly the same with .999... and you get 1, so where’s the counter example?

## Re: Real Numbers

Hi Rick,The interesting idea behind the oval diagrams is that one can form a closure of the number system behind with successively stronger notions of closure....

## Re: Real Numbers

Why stop there? Why not go on to the hyper reals? I.e the structure in which infinitesimal exis.

...

## Re: OFF TOPIC: A Question About PI

You completely misunderstand the comment - it is not that 0 is a special value that needs to be excluded form your claim. Rather it is that 0 is the only value...

## Re: OFF TOPIC: A Question About PI

Your claim ‘2’ is wrong - let’s do some aritmeticx = x + y => y = 0So obviously#sy = #s + y’ where y’ is y shifted to the right#s + y’ = #s =>...

No

## Re: OFF TOPIC: A Question About PI

The claim “If pi contains any number (digit sequence), and hence, if I can prove that the digit sequence of pi itself is contained within pi, then I have proven...

## Re: OFF TOPIC: A Question About PI

When I replied earlier I thought I could see the ‘simple’ proof for finite sequences. I was wrong and the more I think about the proof the more I think it is...

## Re: OFF TOPIC: A Question About PI

The answer is ‘no’ if  by contains a number you mean that you can find a sequence starting with the first digit of the number and continuing in the same way...

Yes

## Re: Far Off Topic: A Simple Geometry Problem That Had Me "Going in Circles"

To work out the distance traveled you need to consider the motion of the centre of the circle B around A - this gives the travel length as 4 units.

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