Proof: Prove B^T ~ A^T (Transpose)

  • Thread starter Thread starter jesuslovesu
  • Start date Start date
  • Tags Tags
    Proof
Click For Summary
SUMMARY

The discussion focuses on proving that if matrix B is similar to matrix A (denoted as B ~ A), then the transpose of B (B^T) is also similar to the transpose of A (A^T). The proof utilizes the relationship B = P^-1 * A * P, leading to B^T = P^T * A^T * (P^-1)^T. It is established that P does not need to be the identity matrix; rather, it suffices that (P^T)^(-1) = (P^(-1))^T, which holds for any invertible matrix P.

PREREQUISITES
  • Understanding of matrix similarity and properties of similar matrices
  • Familiarity with matrix transposition and its properties
  • Knowledge of invertible matrices and their characteristics
  • Basic linear algebra concepts, including matrix multiplication
NEXT STEPS
  • Study the properties of similar matrices in linear algebra
  • Learn about the implications of matrix transposition on eigenvalues
  • Explore the concept of invertible matrices and their role in transformations
  • Investigate the relationship between matrix similarity and diagonalization
USEFUL FOR

Students and educators in linear algebra, mathematicians interested in matrix theory, and anyone seeking to deepen their understanding of matrix properties and proofs.

jesuslovesu
Messages
185
Reaction score
0

Homework Statement


Prove B^T ~ A^T (tranpose)
Given: B ~ A
Can anyone check if my proof is correct? Towards the end I'm not quite sure if I can do it like that. Do I have to say what P is exactly? The only matrix I can think that would satisfy that is the identity matrix.

Homework Equations


The Attempt at a Solution



B ~ A
B = P^-1 * A * P
B^T = P^T * A^T * (P^-1)^T
so P is a matrix that where P^T = P^-1 therefore (P^T)^-1 = P
B^T = P^-1 * A^T * P
B^T ~ A^T
 
Last edited:
Physics news on Phys.org
You don't need to assume P^(-1)=P^T. That means P is a special kind of matrix. It's enough that (P^T)^(-1)=(P^(-1))^T, which is true for any invertible matrix.
 

Similar threads

  • · Replies 24 ·
Replies
24
Views
4K
  • · Replies 7 ·
Replies
7
Views
1K
Replies
5
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 6 ·
Replies
6
Views
1K
  • · Replies 16 ·
Replies
16
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 1 ·
Replies
1
Views
2K