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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2009-08-19 11:49:39

MathsIsFun
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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
 

#2 2009-08-19 13:50:03

bobbym
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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.
 

#3 2009-08-19 22:06:29

mathsyperson
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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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