Properties of the equivalence relation

Click For Summary

Discussion Overview

The discussion revolves around the properties of equivalence relations, specifically the symmetric and transitive properties of equality. Participants seek examples that illustrate these properties in a concrete manner rather than abstract generalizations.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant requests examples of the symmetric and transitive properties of equality, expressing difficulty with the abstract nature of these concepts.
  • Another participant provides the generalized definitions of symmetry and transitivity but is challenged for not offering specific examples.
  • A different participant suggests using a specific relation R with pairs of elements to analyze its symmetry and transitivity.
  • One participant proposes a real-world example involving equivalence based on shared parentage, illustrating both properties through this context.
  • There is a discussion about the nature of examples, with a participant noting the distinction between examples of properties and examples of objects with properties.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the type of examples needed, with some focusing on abstract properties while others seek concrete instances. The discussion remains unresolved regarding the clarity of the original request for examples.

Contextual Notes

Some participants express confusion over the distinction between properties and examples, indicating a potential limitation in the clarity of the questions posed.

paulmdrdo1
Messages
382
Reaction score
0
can you give an example of symmetric property of equality and transitive property of equality. the generalization of these properties are a bit abstract for me. thanks!
 
Mathematics news on Phys.org
Re: Properties of th equivalence relation

paulmdrdo said:
can you give an example of symmetric property of equality and transitive property of equality. the generalization of these properties are a bit abstract for me. thanks!
Given a, b, and c
Symmetry: a = b implies b = a

Transitive: (a = b and b = c) implies a = c

Is that what you were looking for?

-Dan
 
Re: Properties of th equivalence relation

no. that's the generalize form. i want an example where you can apply the properties.
 
Re: Properties of th equivalence relation

paulmdrdo said:
no. that's the generalize form. i want an example where you can apply the properties.
Are you thinking of something along the lines of
R = {(0, 0), (0, 1), (1, 0), (1, 1), (1, 2), (2, 0), (2, 1), (2, 2)}
and then determining if R is symmetric and/or transitive?

-Dan
 
Re: Properties of th equivalence relation

yes!
 
Re: Properties of th equivalence relation

How about "A is equivalent to B if and only if A and B are people and A has the same parents as B".

If A is equivalent to B then A has the same parents as B so that B has the same parents as A: B is equivalent to A.

If A is equivalent to B and B is equivalent to C, then A has the same parents as B and B has the same parents as A. It follows that A has the same parents as C: A is equivalent to C.
 
Re: Properties of th equivalence relation

paulmdrdo said:
can you give an example of symmetric property of equality and transitive property of equality.

topsquark said:
Are you thinking of something along the lines of
R = {(0, 0), (0, 1), (1, 0), (1, 1), (1, 2), (2, 0), (2, 1), (2, 2)}
and then determining if R is symmetric and/or transitive?

paulmdrdo said:
yes!
Hmm. OP, you seem to ask not for an example of a property of equality, but for an example of equality, and, in fact, not of equality, but of an arbitrary relation. I know what an example of an object (e.g., a car) is and what an example of an object with some property (e.g., a red car) is, but I don't know what an example of a property is (what is an example of red?). Formulating your questions precisely is half the answer.
 

Similar threads

  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 13 ·
Replies
13
Views
5K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
3
Views
2K
  • · Replies 7 ·
Replies
7
Views
1K
  • · Replies 15 ·
Replies
15
Views
1K
Replies
2
Views
2K