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#1 2009-08-18 13:49:39

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,534

Intervals

Another page for your perusal and comment: Intervals


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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#2 2009-08-18 15:50:03

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,597

Re: Intervals

Hi MathsisFun;

Explains it nicely. I can not improve on it.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#3 2009-08-19 00:06:29

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: Intervals

Yep, another nice page.
It might be worth mentioning that an "outward facing" square bracket is sometimes used instead of a round one for open intervals.

eg. (0,1) = ]0,1[

() is my preferred notation though.


Why did the vector cross the road?
It wanted to be normal.

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