Let H be a subgroup of Sn. (a) Show that either all the permutations in H are even, or else half the permutations in H are even and half are odd. (b) Show that the set of even permutations in H form a subgroup of H.
Let H be a subgroup of Sn. (a) Show that either all the permutations in H are even, or else half the permutations in H are even and half are odd. (b) Show that the set of even permutations in H form a subgroup of H.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.5: Normal Subgroups
Problem 16E: 16. Let be a subgroup of and assume that every left coset of in is equal to a right coset of in ....
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