Suppose that f:G - G such that f(x) = axa". Then fis a group homomorphism if and only if O a^3 = e a = e O a^4 = e a^2 = e O O O
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- 4. Prove that the special linear group is a normal subgroup of the general linear group .Find two groups of order 6 that are not isomorphic.27. a. Show that a cyclic group of order has a cyclic group of order as a homomorphic image. b. Show that a cyclic group of order has a cyclic group of order as a homomorphic image.
- 11. Show that defined by is not a homomorphism.Exercise 8 states that every subgroup of an abelian group is normal. Give an example of a nonabelian group for which every subgroup is normal. Exercise 8: Show that every subgroup of an abelian group is normal.Show that the inner direct product group is isomorphic to external direct sum group by constructing a function f:H1 x H2 x ... x Hn ---> H1 + H2 + ... + Hn via h1h2...hn ---> (h1, h2,...,hn), showing it is isomorphism. Please explain each step clearly. Thanks.
- Prove that the mapping from R under addition to SL(2,R) that takes x to [ cos x sin x -sin x cos x] is a group homomorphism. Find the kernel.List the six elements of GL(2, Z2). Show that this group is non-Abelian by finding two elements that do not commuteWrite under isomorphism all abelian and non-abelian groups of order 8 and their respective subgroups. Please be as clear as possible and legible. Thank you.
- Find Aut(Z15) . Use the Fundamental Theorem of Abelian Groups to express this group as an external direct product of cyclic groups of prime power order. Please be clear with theorems, rules. Be legible.Find Aut(Z20). Use the fundamental theorem of Abelian groups to express this group as an external direct product of cyclic groups of prime power order.Write under isomorphism all the abelian groups of order 8 and their respective subgroups. Please show all the steps as clear as possible expleining them. Thank you