Norms of Minimal Projections
نویسندگان
چکیده
It is proved that the projection constants of twoand three-dimensional spaces are bounded by 4/3 and (1 + √ 5)/2, respectively. These bounds are attained precisely by the spaces whose unit balls are the regular hexagon and dodecahedron. In fact, a general inequality for the projection constant of a real or complex n-dimensional space is obtained and the question of equality therein is discussed. 1,2 During the work on this paper both authors were partially supported by NATO Collaborative Research Grant CRG 920047.
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تاریخ انتشار 1992