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October 16th, 2019, 12:16 PM  #1 
Newbie Joined: Sep 2019 From: Toronto Posts: 7 Thanks: 0  On the set N × N, define the following relation: (a, b) ∼ (c, d) if and only if a + d
On the set N × N, define the following relation: (a, b) ∼ (c, d) if and only if a + d = b + c. (1) Show that this is an equivalence relation (2) Describe the equivalence class of (1, 1) 
October 16th, 2019, 01:04 PM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 2,340 Thanks: 983 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan Last edited by topsquark; October 16th, 2019 at 01:08 PM.  

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