A note on the spectral area of Toeplitz operators

@inproceedings{Chu2015ANO,
  title={A note on the spectral area of Toeplitz operators},
  author={Cheng Qun Chu and Dmitry Khavinson},
  year={2015}
}
In this note, we show that for hyponormal Toeplitz operators, there exists a lower bound for the area of the spectrum. This extends the known estimate for the spectral area of Toeplitz operators with an analytic symbol. 

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Self-commutator norm of hyponormal Toeplitz operators

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