Find an Orthonormal Basis for Linear Algebra A

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SUMMARY

The discussion focuses on finding an orthonormal basis for the null space of the transpose of matrix A, denoted as N(A^T). The matrix A is defined as A = [[1/2, -1/2], [1/2, -1/2], [1/2, 1/2], [1/2, 1/2]]. Participants clarify that N(A^T) refers to the null space, which consists of all vectors v such that A^T v = 0. The conversation emphasizes the importance of writing out the equations derived from A^T v = 0 to simplify and solve for the vectors in the null space.

PREREQUISITES
  • Understanding of matrix operations, specifically matrix transposition.
  • Familiarity with the concept of null space in linear algebra.
  • Ability to solve linear equations involving vectors and matrices.
  • Knowledge of orthonormal basis and its significance in vector spaces.
NEXT STEPS
  • Study the process of finding the null space of a matrix, particularly using examples similar to A.
  • Learn about Gram-Schmidt orthogonalization to construct orthonormal bases.
  • Explore the implications of null spaces in linear transformations and their applications.
  • Investigate the relationship between null spaces and rank-nullity theorem in linear algebra.
USEFUL FOR

Students and professionals in mathematics, particularly those studying linear algebra, as well as educators seeking to enhance their understanding of orthonormal bases and null spaces.

Bob
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[tex]A=\left(\begin{array}{cc}\frac{1}{2}&-\frac{1}{2}\\\frac{1}{2}&-\frac{1}{2}\\\frac{1}{2}&\frac{1}{2}\\\frac{1}{2}&\frac{1}{2}\end{array}\right)[/tex]

Find an orthonomal basis for N(A^T)

:smile:
 
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What is N(A^T)? I know what A^T means, but what does the N of it mean?
 
The null space. The set of all vector, v, such that ATv= 0.

Bob, write v as (a, b, c, d) and write out the two equations corresponding to ATv= 0. Simplify them.
 

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