2. Is H closed under addition? If it is, enter CLOSED. If it is not, enter two matrices in H whose sum is not in H, using a comma separated list and syntax such as [[1,2],[3,4]], [[5,6], [7,8]] for the [1 2] answer [33] [58]- (Hint: to show that H is not closed under addition, it is sufficient to find two idempotent matrices A and B such that (A + B)² ‡ (A + B).) closed 3. Is H closed under scalar multiplication? If it is, enter CLOSED. If it is not, enter a scalar in R and a matrix in H whose product is not in H, using a comma separated list and syntax such as 2, [[3,4], [5,6]] for the answer 2, [36]. (Hint: to show that H is not closed under scalar 5 multiplication, it is sufficient to find a real number r and an idempotent matrix A such that (rA)² + (rA).) closed 4. Is H a subspace of the vector space V? You should be able to justify your answer by writing a complete, coherent, and detailed proof based on your answers to parts 1-3. H is not a subspace of V

Elementary Linear Algebra (MindTap Course List)
8th Edition
ISBN:9781305658004
Author:Ron Larson
Publisher:Ron Larson
Chapter4: Vector Spaces
Section4.6: Rank Of A Matrix And Systems Of Linear Equations
Problem 67E: Let A be an mn matrix where mn whose rank is r. a What is the largest value r can be? b How many...
icon
Related questions
Question

Please answer correctly following the same format as the questions. Box the correct answer and I will give a thumbs up if the answer is correct, a thumbs down if answer is incorrect.

Chapter 4.1 Question 6

Please answer the two red boxes

You have answered 2 out of 4 parts correctly.
A square matrix A is idempotent if A² = A.
Let V be the vector space of all 2 × 2 matrices with real entries. Let H be the set of all 2 × 2 idempotent
matrices with real entries. Is H a subspace of the vector space V?
1. Does H contain the zero vector of V?
H contains the zero vector of V
2. Is H closed under addition? If it is, enter CLOSED. If it is not, enter two matrices in H whose sum is
not in H, using a comma separated list and syntax such as [[1,2],[3,4]], [[5,6], [7,8]] for the
2]
answer
[158]. (Hint: to show that H is not closed under addition, it is sufficient to find two
3
idempotent matrices A and B such that (A + B)² ‡ (A + B).)
closed
3. Is H closed under scalar multiplication? If it is, enter CLOSED. If it is not, enter a scalar in R and a
matrix in H whose product is not in H, using a comma separated list and syntax such as
2, [[3,4], [5,6]] for the answer 2, [34]. (Hint: to show that H is not closed under scalar
5
multiplication, it is sufficient to find a real number r and an idempotent matrix A such that
(rA)² + (rA).)
closed
4. Is H a subspace of the vector space V? You should be able to justify your answer by writing a
complete, coherent, and detailed proof based on your answers to parts 1-3.
H is not a subspace of V
Transcribed Image Text:You have answered 2 out of 4 parts correctly. A square matrix A is idempotent if A² = A. Let V be the vector space of all 2 × 2 matrices with real entries. Let H be the set of all 2 × 2 idempotent matrices with real entries. Is H a subspace of the vector space V? 1. Does H contain the zero vector of V? H contains the zero vector of V 2. Is H closed under addition? If it is, enter CLOSED. If it is not, enter two matrices in H whose sum is not in H, using a comma separated list and syntax such as [[1,2],[3,4]], [[5,6], [7,8]] for the 2] answer [158]. (Hint: to show that H is not closed under addition, it is sufficient to find two 3 idempotent matrices A and B such that (A + B)² ‡ (A + B).) closed 3. Is H closed under scalar multiplication? If it is, enter CLOSED. If it is not, enter a scalar in R and a matrix in H whose product is not in H, using a comma separated list and syntax such as 2, [[3,4], [5,6]] for the answer 2, [34]. (Hint: to show that H is not closed under scalar 5 multiplication, it is sufficient to find a real number r and an idempotent matrix A such that (rA)² + (rA).) closed 4. Is H a subspace of the vector space V? You should be able to justify your answer by writing a complete, coherent, and detailed proof based on your answers to parts 1-3. H is not a subspace of V
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

Blurred answer
Recommended textbooks for you
Elementary Linear Algebra (MindTap Course List)
Elementary Linear Algebra (MindTap Course List)
Algebra
ISBN:
9781305658004
Author:
Ron Larson
Publisher:
Cengage Learning
Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning