Geodesic
On the Multiplier Space Generated by the Rademacher System
Matematičeskie zametki, Tome 75 (2004) no. 2, pp. 173-181.

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In this paper, we consider the space of multipliers of symmetric spaces with respect to the Rademacher systems. We obtain sufficient conditions under which the space in question coincides with the space $L_\infty$ (with equivalence of norms). These conditions are stated in terms of operator interpolation theory and are essentially weaker than the conditions for the solution of this problem recently obtained by other authors. 
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S. V. Astashkin. On the Multiplier Space Generated by the Rademacher System. Matematičeskie zametki, Tome 75 (2004) no. 2, pp. 173-181. http://geodesic.mathdoc.fr/item/MZM_2004_75_2_a1/

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