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Conditionally minimal projections. (English) Zbl 1138.46010

It is well-known that in Hilbert space, the orthogonal projection is minimal. The author seeks minimal projections which do not contain the orthogonal projection. This research is motivated by earlier results concerning oblique projections, see [G.Corach, A.Maestripieri and D.A.Stojanoff, Banach Center Publications 67, 145–160 (2005; Zbl 1091.47017)].

MSC:

46B20 Geometry and structure of normed linear spaces
47A05 General (adjoints, conjugates, products, inverses, domains, ranges, etc.)
47A58 Linear operator approximation theory

Citations:

Zbl 1091.47017
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