a) Let L : V –→ V be a linear transformation and let B = {v1,..., vn} be a basis for V. Suppose that L(v;) is a linear combination of the vectors v1,..., v; for all 1 < i < n. (Equivalently, this says L(v;) E Span(v1, ..., v;).) Prove that [L]B is upper triangular. b) Find the characteristic polynomial PA(t) of the matrix A given below, where a, µ E C are non-zero. 1 A = 1 1 c) Give matrices B and C such that B is an upper triangular matrix and C is an invertible matrix so that B = C-1AC.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.6: The Matrix Of A Linear Transformation
Problem 43EQ
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Definition:
0 whenever i > j. (So, the only
A square matrix A = [a;,j]1<i,j<n is called upper triangular if a;,j
non-zero elements are in the triangular region on or above the diagonal.)
Transcribed Image Text:Definition: 0 whenever i > j. (So, the only A square matrix A = [a;,j]1<i,j<n is called upper triangular if a;,j non-zero elements are in the triangular region on or above the diagonal.)
a) Let L : V –→ V be a linear transformation and let B = {v1,..., vn} be a basis for V. Suppose that
L(v;) is a linear combination of the vectors v1,. .. , V; for all 1 < i < n. (Equivalently, this says
L(v;) E Span(vı, ..., vi).) Prove that [L]g is upper triangular.
b) Find the characteristic polynomial PA(t) of the matrix A given below, where a, u E C are non-zero.
4.
1
A =
1
1
c) Give matrices B and C such that B is an upper triangular matrix and C is an invertible matrix
so that B = C-lAC.
Transcribed Image Text:a) Let L : V –→ V be a linear transformation and let B = {v1,..., vn} be a basis for V. Suppose that L(v;) is a linear combination of the vectors v1,. .. , V; for all 1 < i < n. (Equivalently, this says L(v;) E Span(vı, ..., vi).) Prove that [L]g is upper triangular. b) Find the characteristic polynomial PA(t) of the matrix A given below, where a, u E C are non-zero. 4. 1 A = 1 1 c) Give matrices B and C such that B is an upper triangular matrix and C is an invertible matrix so that B = C-lAC.
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