0 votes 0 votes R = { (x,y) ∈ z X z : x-y is even integer } is this reflexive how to prove and what this set is representing , z= set of integers sumit goyal 1 asked Dec 9, 2017 sumit goyal 1 381 views answer comment Share Follow See all 4 Comments See all 4 4 Comments reply saxena0612 commented Dec 9, 2017 reply Follow Share $(x,x)\epsilon \ R \ if\ (x-x) \ is \ even \ and \ integer \ , \\ (x,x) \ is \ 0 \\ \therefore \ Relation \ is \ Reflexive$ 1 votes 1 votes sumit goyal 1 commented Dec 9, 2017 reply Follow Share what is X here bro saxena0612 and whty it is written like zXz ? 0 votes 0 votes saxena0612 commented Dec 9, 2017 reply Follow Share It should be $ (x,y) \ \epsilon \ Z $ i.e both are integers. 1 votes 1 votes sumit goyal 1 commented Dec 9, 2017 reply Follow Share thanks now it make sense :) 0 votes 0 votes Please log in or register to add a comment.