7a) Let V be finite-dimensional. Let F be algebraically closed. Let T : V → V be a linear operator. Suppose for each eigenvalue A of T, ma(A) = 1. Prove that T is diagonalizable. b) Is part a) true if we do not assume that F is algebraically closed? Prove or find a counterexample.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter7: Distance And Approximation
Section7.1: Inner Product Spaces
Problem 11AEXP
icon
Related questions
icon
Concept explainers
Topic Video
Question

please prove! 

6) Let V be finite-dimensional. Let T, U : V → V be linear operators on V.
Suppose that T and U commute.
a) For each eigenvalue A of T, show that the corresponding eigenspace Ex(T) is
U-invariant.
b) Suppose U and T are diagonalizable. Prove that there exists a single basis B of
V such that [T, and [U]g are both diagonal matrices.
Transcribed Image Text:6) Let V be finite-dimensional. Let T, U : V → V be linear operators on V. Suppose that T and U commute. a) For each eigenvalue A of T, show that the corresponding eigenspace Ex(T) is U-invariant. b) Suppose U and T are diagonalizable. Prove that there exists a single basis B of V such that [T, and [U]g are both diagonal matrices.
7a) Let V be finite-dimensional. Let F be algebraically closed. Let T : V → V
be a linear operator. Suppose for each eigenvalue A of T, ma(A) = 1. Prove that
T is diagonalizable.
b) Is part a) true if we do not assume that F is algebraically closed? Prove or find
a counterexample.
Transcribed Image Text:7a) Let V be finite-dimensional. Let F be algebraically closed. Let T : V → V be a linear operator. Suppose for each eigenvalue A of T, ma(A) = 1. Prove that T is diagonalizable. b) Is part a) true if we do not assume that F is algebraically closed? Prove or find a counterexample.
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Sample space, Events, and Basic Rules of Probability
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, advanced-math and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning
Elements Of Modern Algebra
Elements Of Modern Algebra
Algebra
ISBN:
9781285463230
Author:
Gilbert, Linda, Jimmie
Publisher:
Cengage Learning,