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I can't find this over the Internet: what does a matrix with a prime mean?

A'

I found this in an exercise, this is in basic linear algebra.

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Look through your text. It might mean another matrix, or it could mean the transpose. The notation is not standard. So your textbook author has something specific in mind. –  Scott Carter Oct 9 '12 at 18:25
    
It really is quite contextual. Sometimes $A^{\prime}$ is taken to mean the transpose of the matrix. –  EuYu Oct 9 '12 at 18:25
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It could also just denote another matrix, or it could be denoting a change of basis making a matrix from A to A'. –  rschwieb Oct 9 '12 at 18:29
    
If you state the exercise, it will probably make the meaning evident. –  hardmath Oct 9 '12 at 18:36
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1 Answer

In Matlab, this means adjoint or hermitian conjugate: $A^\dagger$

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