Practice problem with invertible matrices

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SUMMARY

The discussion focuses on simplifying the expression (B^{-1}A^{T})^{-1}B^{-1}(ABA)^{T}((AB)^{T})^{-1}. The participants confirm that the simplification leads to the identity matrix I. The key steps involve applying properties of invertible matrices and transposes, specifically using A^{-T}B and B^{-1} in the simplification process.

PREREQUISITES
  • Understanding of matrix operations, specifically inverses and transposes.
  • Familiarity with properties of invertible matrices.
  • Knowledge of linear algebra concepts, particularly identity matrices.
  • Experience with symbolic manipulation of algebraic expressions.
NEXT STEPS
  • Study the properties of matrix inverses in linear algebra.
  • Learn about the implications of the transpose operation on matrix products.
  • Explore examples of simplifying complex matrix expressions.
  • Investigate the role of identity matrices in linear transformations.
USEFUL FOR

Students and professionals in mathematics, particularly those studying linear algebra, as well as educators looking to enhance their understanding of matrix operations and simplifications.

myusernameis
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Simplify: (B[tex]^{-1}[/tex]A[tex]^{T}[/tex])[tex]^{-1}[/tex]B[tex]^{-1}[/tex](ABA)[tex]^{T}[/tex]((AB)[tex]^{T}[/tex])[tex]^{-1}[/tex]

Is the answer 1?

thx
 
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Yep,
[tex]A^{-T}B \ \ B^{-1}\ \ A^TB^TA^T \ \ A^{-T}B^{-t} = I[/tex]
 

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