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Sard's approximation processes and oblique projections
2009
Studia Mathematica
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Three problems arising in approximation theory are studied. These problems have already been studied by Arthur Sard. The main goal of this paper is to use geometrical compatibility theory to extend Sard's results and get characterizations of the sets of solutions. 2000 Mathematics Subject Classification: Primary 47A58, 41A65; Secondary 93E24.
doi:10.4064/sm194-1-4
fatcat:daufccvesbgmznrsaptno5avp4