Thread: Reflexive relation

Is x=-/+y reflexive? (x, y) exists in R, on a set of all real numbers.

Sorry, don't know how to put in the positive or negative symbol.

I'm thinking it is, but I don't know how to express it in a proof.

Thanks!

Originally Posted by SlapnutsGT

Is x=-/+y reflexive? (x, y) exists in R

Is this true : both of these pairs are in the relation?

Originally Posted by Plato

Is this true : both of these pairs are in the relation?

I would assume yes, because it exists in a set of all real numbers. Only info given is:
Determine whether the relation R on the set of all real numbers is reflexive, symmetric, antisymmetric, and/or transitive, where if and only if .

Originally Posted by SlapnutsGT

I would assume yes, because it exists in a set of all real numbers. Only info given is:
Determine whether the relation R on the set of all real numbers is reflexive, symmetric, antisymmetric, and/or transitive, where if and only if .

You missed my point. If the answer is yes then it is reflexive.

BTW: To get type [tex]\pm[/tex]

Doh! I can be a knucklehead sometimes, kinda missed your point because I'm struggling to understand discrete math. Math without numbers is still a new concept to me! Thanks you for the help!