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The second named author was supported in part by the Deutsche Forschungsgemeinschaft under grant No. Go 261/5-1.
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Görlich, E., Markett, C. A lower bound for projection operators onL 1 (−1, 1). Ark. Mat. 24, 81–92 (1985). https://doi.org/10.1007/BF02384390
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DOI: https://doi.org/10.1007/BF02384390