Reference no: EM131026665
1. Let G be a group and let a,b be two elements of G. The conjugate of b by a is, by definition, the element . The centralizer of a, denoted by s the set of all elements g in G such that ga=ag.
i) Find all possible conjugates f the permutation
ii) Find the centralizer p in .
iii) Prove that for any element a in a group G, the centralizer is a subgroup of G.
2. Let G= , the non zero real numbers, with operation given by multiplication. Let H be , the positive real numbers, with operation given by multiplication. You may assume that G and H are groups. Let be the map given by .
i) Prove that is a group homomorphism.
ii) Compute ker and im , explaining your answer
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