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Miscellanea

$ \mathrm{Ball}$ unit ball
$ \bigoplus_{i=1}^n X_i$ $ n$th direct sum
$ \bigoplus_{n \in {\mathbb{N}}} X_n$ countable direct sum
$ T^*$ the adjoint of the operator $ T$


Prof. Gerd Wittstock 2001-01-07