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Article

Fitzpatrick, Simon ; Calvert, Bruce
Sets invariant under projections onto two dimensional subspaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 32 (1991), issue 2, pp. 233-239
MSC: 46A03, 46A55, 46C05, 46C15, 52A07, 52A15 | MR 1137784 | Zbl 0756.46010
Keywords:
inner product space; two dimensional subspace; projection
Summary:

Related articles:
Sets invariant under projections onto one dimensional subspaces
Correction to the paper: Sets invariant under projections onto one dimensional subspaces
References:
[1] Amir D.: Characterizations of Inner Product Spaces. Birkhäuser Verlag, Basel, Boston, Stuttgart, 1986. MR 0897527 | Zbl 0617.46030
[2] Calvert B., Fitzpatrick S.: Nonexpansive projections onto two dimensional subspaces of Banach spaces. Bull. Aust. Math. Soc. 37 (1988), 149-160. MR 0926986 | Zbl 0634.46013
[3] Fitzpatrick S., Calvert B.: Sets invariant under projections onto one dimensional subspaces. Comment. Math. Univ. Carolinae 32 (1991), 227-232. MR 1137783 | Zbl 0756.52002
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