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Homework Statement
A is some set.
R is a relation (set of ordered pairs), and is transitive on A.
S = {(x,y) | (x,y) is element of R, (y,x) is not element of R}
Show that S is transitive and trichotomic on A.
Homework Equations
Transitivity: With xRy and yRz ==> xRz
The Attempt at a Solution
For all x, y, z element of A : xRy and yRz ==> xRz
and for all a, b, c element of A: aRb and bRc ==> aRc
Now my problem: when I want to show transitivity from S on A, how can I be sure that c != x and a != z, because S is defined as (x,y) element R but not (y, x).
It would be nice if someone could write out the solution for this problem in full. I need a good example to hold on to when trying to solve other problems. I hope I don't ask for to much...