Consider the example where G is the symmetries of the square, and H is the rotations of the square. Then the two cosets of H are { elt[1], elt[2], elt[3], elt[4] } = H = H xid, and { elt [5], elt [6], elt [7], elt [8] ] = H • elt [5]. A set of coset representatives is { elt[1], elt[5] } and the reader can verify that each element is uniquely expressible as a product of an element of H and a coset representative.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.8: Determinants
Problem 2E
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Consider the example where G is the symmetries of the square, and H is the rotations of the
square. Then the two cosets of H are { elt[1], elt[2], elt[3], elt[4] } = H = H xid, and
{ elt [5], elt [6], elt [7], elt [8] ] = H • elt [5]. A set of coset representatives is
{ elt[1], elt[5] } and the reader can verify that each element is uniquely expressible as a
product of an element of H and a coset representative. 

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