Help required1

Can anyone with help me with mathematics sets/

How can I determine the type of relationships in sets such as equivalence, inverse, reflexive, symmetrical and transitive?

here is ab example X = {1,2,3}

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- July 30th 2009, 03:51 AMbrucycurlzMathematics Sets
Help required1

Can anyone with help me with mathematics sets/

How can I determine the type of relationships in sets such as equivalence, inverse, reflexive, symmetrical and transitive?

here is ab example X = {1,2,3} - July 30th 2009, 05:23 AMSwlabr
Sets in themselves do not have "equivalence" or "inverses", and they cannot be "reflexive", "symmetrical" or "transitive". We must take the set

*under a relation*. For instance, let us examine the set you have given under the relation "=". Clearly, for we have that (reflexive), if then (symmetric), and if and then . Thus, "=" is called an equivalence relation (an absurdly simple example, I know).

I'm not entirely sure what you mean by inverses. If we take a set under an operation, for instance the set under addition modulo 3 then you have an identity element, (an identity element is a neutral element - ), and every element has an inverse (an element that will take the element back to the inverse): the inverse of 1 is 2 and the inverse of 2 is 1 as .

Is that what you are looking for?