Kowynia, Joanna Conditionally minimal projections. (English) Zbl 1138.46010 Zesz. Nauk. Uniw. Jagiell. 1285, Univ. Iagell. Acta Math. 43, 165-179 (2005). 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)]. Reviewer: Anatoliy Swishchuk (Calgary) MSC: 46B20 Geometry and structure of normed linear spaces 47A05 General (adjoints, conjugates, products, inverses, domains, ranges, etc.) 47A58 Linear operator approximation theory Keywords:minimal projections; orthogonal projections; oblique projections Citations:Zbl 1091.47017 PDFBibTeX XMLCite \textit{J. Kowynia}, Zesz. Nauk. Uniw. Jagiell., Univ. Iagell. Acta Math. 1285(43), 165--179 (2005; Zbl 1138.46010) Full Text: EuDML