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BF02395019
BF02395019
http://dx.doi.org/10.1007/BF02395019
On two problems concerning linear transformations in hilbert space
P356
Q29042108-345B8FAA-5A83-4E96-90CE-858D17435E1C
P356
BF02395019
http://dx.doi.org/10.1007/BF02395019