Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: Collinear
Replies: 9   Last Post: May 8, 2013 1:12 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
fom

Posts: 1,968
Registered: 12/4/12
Re: Collinear
Posted: May 7, 2013 6:25 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 5/7/2013 2:48 AM, William Elliot wrote:
> Let C be a collection of n points with the property that
> any line L with two points of C on it, has a third point
> of C on it.
>
> How is it that C is collinear, ie all points of C are
> on a single line?
>



Is this true?

If I recall, there is something from
design theory called a Pasch configuration.


ABC
AEF
BDF
CDE


C
|
B
|
| D
|
A----E---F

Maybe I am not recalling correctly.

This is better:

http://mathworld.wolfram.com/PaschConfiguration.html





Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.