Geodesic
A~construction of complete minimal, but not uniformly minimal, exponential systems with real separable spectrum in $L^p$ and $C$
Matematičeskie zametki, Tome 58 (1995) no. 4, pp. 582-595.

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We construct real separable sequences $\{\lambda_n\}$ such that the corresponding systems of exponentials $\exp(i\lambda_nt)$ are complete and minimal, but not uniformly minimal, in the spaces $L^1(-\pi,\pi)$, $L^p(-\pi,\pi)$, $1\le p\infty$, $C[-\pi,\pi]$. 
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     title = {A~construction of complete minimal, but not uniformly minimal, exponential systems with real separable spectrum in $L^p$ and $C$},
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A. M. Sedletskii. A~construction of complete minimal, but not uniformly minimal, exponential systems with real separable spectrum in $L^p$ and $C$. Matematičeskie zametki, Tome 58 (1995) no. 4, pp. 582-595. http://geodesic.mathdoc.fr/item/MZM_1995_58_4_a9/

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