T be a linear operator on a finite-dimensional vector space V, and let Wi be a
Chapter 7, Problem 16(choose chapter or problem)
T be a linear operator on a finite-dimensional vector space V, and let Wi be a T-invariant subspace of V. Let x G V such that .; ^ Wi. Prove the following results. (a) There exists a unique monic polynomial g\ (t) of least positive degree such that 0] (T)(.T) G WI. (b) If fi.(t) is a polynomial for which h(T)(x) G Wi, then gi(t) divides h(t). (c) gi(t) divides the minimal and the characteristic polynomials of T. (d) Let W2 be a T-invariant subspace of V such that W2 C W^ and let g2(t) be the unique monic polynomial of least degree such that g2(T)(x) G W2. Then gi(t) divides g2(t).
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