Ingham type theorems and applications to control theory
详细信息 查看全文
文摘
Ingham improved a previous result of Wiener on nonharmonic Fourier series. Modifying his weight function we obtain optimal results improving several earlier theorems of Kahane, Castro and Zuazua and of Jaffard, Tucsnak, and Zuazua. Then we apply these results to simultaneous observability problems.