A note on exponential Riesz bases

Andrei Caragea, Dae Gwan Lee

We prove that if $I_{\ell }=[a_{\ell },b_{\ell })$, $\ell =1,\dots ,L$, are disjoint intervals in $[0,1)$ with the property that the numbers $1,a_1,\dots ,a_L,b_1,\dots ,b_L$ are l…