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: Nhood Space
Replies: 24   Last Post: Jul 3, 2013 10:43 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: Nhood Space
Posted: Jun 30, 2013 10:18 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 6/30/2013 9:45 AM, dullrich@sprynet.com wrote:
> On Sat, 29 Jun 2013 21:39:59 -0700, William Elliot <marsh@panix.com>
> wrote:
>

>> (S,<<) is a nhood space when << is a binary relation for P(S) and
>> for all A,B,C subset S
>> empty set << A << S
>> A << B implies A subset B
>> A << B implies S\B << S\A
>> A << B/\C iff A << B and A << C

>
> You need to clarify the context! We've been through
> this before. Tell us whether
>
> (i) this is an actual definition you saw somewhere
>



These are proximity neighborhoods.

http://en.wikipedia.org/wiki/Proximity_space






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.