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Topic: Was solving the Poincare's conjecture a big deal?
Replies: 13   Last Post: Sep 6, 2006 11:50 PM

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 Gib Bogle Posts: 1,495 Registered: 12/8/04
Re: Was solving the Poincare's conjecture a big deal?
Posted: Sep 6, 2006 6:12 PM

Pubkeybreaker wrote:

> porky_pig_jr@my-deja.com wrote:
>

>>Richard Henry wrote:
>>
>>

>>>What I heard was cutting out the middle removed the undercooked part,
>>>when donuts were deep-fried in lard.

>>
>>Speaking of cutting out the middle. If I start with a sphere, and
>>somehow removed the 'inner sphere',

>
>
> What "inner sphere". I think you are confusing "sphere" with "ball".
> A unit sphere (in E_n) has the equation x_1^2 + x_2^2 + ... + x_n^2
> = 1.
> It does NOT include its interior. To include the interior you need:
> x_1^2 + x_2^2 + ... + x_n^2 < = 1. (note the inequality)
>
>
>

>>the resulting solid
>
>
> There is no solid. A sphere is an n-dimensional SURFACE.
>

Balls!

Date Subject Author
9/5/06 Brablo
9/5/06 Denis Feldmann
9/5/06 Gib Bogle
9/5/06 Brablo
9/5/06 Porky Pig Jr
9/6/06 Pubkeybreaker
9/6/06 Gib Bogle
9/5/06 Gib Bogle
9/6/06 Jeremy Boden
9/5/06 Porky Pig Jr
9/5/06 fishfry
9/6/06 Ronald Bruck
9/6/06 victor_meldrew_666@yahoo.co.uk