Solved

About Heath's theorem

Posted on 2006-11-02
7
1,736 Views
Last Modified: 2009-12-16
What does this theorem say ?
Where is it used? In Normalization ?
0
Comment
Question by:soodsandeep
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
7 Comments
 
LVL 44

Accepted Solution

by:
Arthur_Wood earned 50 total points
ID: 17863973
0
 
LVL 40

Assisted Solution

by:Vadim Rapp
Vadim Rapp earned 50 total points
ID: 17864015
if there's relation between 3 entities a,b,c and you decompose it to a->b and a->c and then join them, then the result will be not less than the original relation.

> Where is it used? In Normalization ?

The above is application to relational area. The theorem itself is formulated in abstract terms, so, like every mathematical fact, it may be used wherever is applicable,
0
 
LVL 40

Expert Comment

by:Vadim Rapp
ID: 18037540
50/50 to Arthur and to me.
0
 
LVL 44

Expert Comment

by:Arthur_Wood
ID: 18041066
works for me.

AW
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Never store passwords in plain text or just their hash: it seems a no-brainier, but there are still plenty of people doing that. I present the why and how on this subject, offering my own real life solution that you can implement right away, bringin…
As technology users and professionals, we’re always learning. Our universal interest in advancing our knowledge of the trade is unmatched by most industries. It’s a curiosity that makes sense, given the climate of change. Within that, there lies a…
Video by: Steve
Using examples as well as descriptions, step through each of the common simple join types, explaining differences in syntax, differences in expected outputs and showing how the queries run along with the actual outputs based upon a simple set of dem…
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

735 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question