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Periodica Mathematica Hungarica
Authors:
M. Baronti
and
P. Papini
We study 1-complemented subspaces of the sequence spaces ℓ1 andc 0. In ℓ1, 1-complemented subspaces of codimensionn are those which can be obtained as intersection ofn 1-complemented hyperplanes. Inc 0, we prove a characterization of 1-complemented subspaces of finite codimension in terms of intersection of hyperplanes.
