New formulas for the spectral radius via Aluthge transform
  In this paper we give several expressions of spectral radius of a bounded operator on a Hilbert space, in terms of iterates of Aluthge transformation, numerical radius and the asymptotic behavior of the powers of this operator. Also we obtain several characterizations of normaloid operators. 
Fadil Chabbabi, Mostafa Mbekhta (LPP)
math.FA math.SP