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Additional information
Translated from Sibirskii Matematicheskii Zhurnal, Vol. 18, No. 4, pp. 799–805, July–August, 1977.
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Kaz'min, Y.A. Closure of the linear span of a system of functions. Sib Math J 18, 565–570 (1977). https://doi.org/10.1007/BF00967197
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DOI: https://doi.org/10.1007/BF00967197