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. Is H nonempty? choose 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 answer [369] (A + B)² (A + B).) (Hint: to show that H is not closed under addition, it is sufficient to find two idempotent matrices A and B such that 3. Is H closed under scalar multiplication? If it is, enter CLOSED. If it is not, enter a scalar in IR and a matrix in H whose product is not in H, using a comma separated list and syntax such as 3 2, [[3,4], [5,6]] for the answer 2, (Hint: to show that H is not closed under scalar multiplication, it is sufficient to find a real number and an idempotent matrix A such that 5 (rA)² + (rA).) 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. choose
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. Is H nonempty? choose 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 answer [369] (A + B)² (A + B).) (Hint: to show that H is not closed under addition, it is sufficient to find two idempotent matrices A and B such that 3. Is H closed under scalar multiplication? If it is, enter CLOSED. If it is not, enter a scalar in IR and a matrix in H whose product is not in H, using a comma separated list and syntax such as 3 2, [[3,4], [5,6]] for the answer 2, (Hint: to show that H is not closed under scalar multiplication, it is sufficient to find a real number and an idempotent matrix A such that 5 (rA)² + (rA).) 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. choose
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
![A square matrix A is idempotent if A² = A.
Let V be the vector space of all 2 x 2 matrices with real entries. Let H be the set of all 2 x 2 idempotent matrices with real entries. Is H a subspace of the vector space V?
1. Is H nonempty?
choose
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 HI, using a comma separated list and syntax such as
[[1,2], [3,4]], [[5,6],[7,8]] for the answer
2
6
[1] [3]
34
78
(A + B)² ‡ (A + B).)
(Hint: to show that H is not closed under addition, it is sufficient to find two idempotent matrices A and B such that
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,
(Hint: to show that H is not closed under scalar multiplication, it is sufficient to find a real number and an idempotent matrix A such that
[33]
5 6
(rA)² + (rA).)
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.
choose](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8f21868f-81f5-47ff-b0b8-24fe685287c0%2F30c3c093-e939-4e70-a1e4-da590c94c8f8%2Fag00oew_processed.png&w=3840&q=75)
Transcribed Image Text:A square matrix A is idempotent if A² = A.
Let V be the vector space of all 2 x 2 matrices with real entries. Let H be the set of all 2 x 2 idempotent matrices with real entries. Is H a subspace of the vector space V?
1. Is H nonempty?
choose
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 HI, using a comma separated list and syntax such as
[[1,2], [3,4]], [[5,6],[7,8]] for the answer
2
6
[1] [3]
34
78
(A + B)² ‡ (A + B).)
(Hint: to show that H is not closed under addition, it is sufficient to find two idempotent matrices A and B such that
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,
(Hint: to show that H is not closed under scalar multiplication, it is sufficient to find a real number and an idempotent matrix A such that
[33]
5 6
(rA)² + (rA).)
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.
choose
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