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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
In Example 2.15, if , xy E ∈ does this mean that x and y are the same age? Not only does an equivalence relation on a set S determine a partition of S, but the partition can be used to determine the relation. We formalize this in the following theorem.
Example 2.15
Let S be the set of all students in a particular university. For x and y in S, define xRy iff x and y were born in the same calendar year. Then R is an equivalence relation, and a typical equivalence class is the set of all students who were born in a particular year. For example, if student x was born in 1992, then Ex consists of all the students who were born in 1992. This relation partitions S into disjoint subsets, where students born in the same year are grouped together.
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