Kennedy Platz, formerly Rudoph-Wilde-Platz, in Berlin-Schoeneberg contains the city hall (Rathaus Schoeneberg). It was the square in which US President John F. Kennedy gave his famous speech to the Berliners, in which he stated : "Ich bin ein Berliner".

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... → Rm (see Euclidean space).
There are also important examples of linear transformation involving infinite-dimensional spaces. For instance, the integral yields a ...