Discrete math questions: a) Define the equivalence relation SS on the integers by xSy⟺11|(x−y).
Discrete math questions: a) Define the equivalence relation SS on the integers by xSy⟺11|(x−y).
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Discrete math questions:
a) Define the equivalence relation SS on the integers by
xSy⟺11|(x−y).
State the least positive integer in the equivalence class of [14].
b) For a set X={1,2,3,4}, let P be the partition
{{1,3},{2,4}}.
The partition P induces a relation R on X. How many distinct ordered pairs are there in R?
c) For a set X={1,2,3,4,5} let P be the partition
{{1,3,4},{2},{5}}.
In the equivalence relation on X induced by P, how many distinct equivalence classes are there?
d) Suppose that S is an equivalence relation on a set
A={1,2,3,4,5,6,7}. If 4∈[3]∩[5], then how are [3] and [5] related?
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