Geodesic
New classes of analytic and Gevrey semigroups and applications
Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni, Série 9, Tome 4 (1993) no. 1, pp. 29-34.

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We consider the operator \( -A + iB \) on a complex Hilbert space, where \( A \) is positive self-adjoint and \( B \) is self-adjoint, and where, moreover, «\( B \) is comparable to \( A^{\alpha} \), \( \alpha \ge 1 \)», in a technical sense. Two applications are given.
Si considera l'operatore \( -A + iB \) in uno spazio di Hilbert complesso, dove \( A \) è autoaggiunto positivo e \( B \) è autoaggiunto, con «\( B \) comparabile con \( A^{\alpha} \), \( \alpha \ge 1 \)». Vengono date due applicazioni. 
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Favini, Angelo; Triggiani, Roberto. New classes of analytic and Gevrey semigroups and applications. Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni, Série 9, Tome 4 (1993) no. 1, pp. 29-34. http://geodesic.mathdoc.fr/item/RLIN_1993_9_4_1_a1/

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