...I'm an experienced GMAT tutor that can offer clever strategy ideas about how to approach the exam. I scored a 740 on the GMAT on the first try. I have my MBA from NYU Stern. (read more)
...Since x = y, ? (xRy ? yRx), x = y. Thus, by definition of antisymmetric, R on A is antisymmetric. Therefore, if R n R-1 ? {(a, a): a ? A}, R on A is antisymmetric. (read more)