# Answer to Question #16810 in Abstract Algebra for Melvin Henriksen

Question #16810

the idealizer IR(A) and the eigenring ER(A) for the right ideal A = xR in the free k-ring R =

k<x, y>, and for the right ideal A = xR where x = i + j + k in the ring of quaternions with integer coefficients.

k<x, y>, and for the right ideal A = xR where x = i + j + k in the ring of quaternions with integer coefficients.

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