Is there any connection between the adjoint mapping that is introduced while studying the matrices, and the adjoint mapping that is introduced while studying inner product spaces ?

I mean, for example Greub first define adjoint mapping while in the "Matrices" section as

enter image description here

and after that in the inner product space section,

enter image description here

but clearly these two map are totally different (just check their determinant), but nevertheless they bear the same name, so it there any connection (for a given fixed $\phi$) these to maps ?

  • 1
    $\begingroup$ The first one looks more like what is called the adjugate, which you come across when trying to write down a formula for the inverse of a matrix: en.wikipedia.org/wiki/Adjugate_matrix $\endgroup$ – Joppy Mar 2 '18 at 11:51
  • 1
    $\begingroup$ No connection that I'm aware of, other than both operations reverse products. $\endgroup$ – darij grinberg Mar 3 '18 at 5:20

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.