Mathematics – Metric Geometry
Scientific paper
2011-08-03
Mathematics
Metric Geometry
Scientific paper
The closest point of a linear variety to an external point is found by using
the equality case of an Ostrowski's type inequality. This point is given in
closed form as the quotient of a (formal) and a (scalar) Gram determinant.
Then, the best approximation pair of points onto two linear varieties is given,
as well as characterization of this pair of best approximation points.
Costa Cecilia
Facas Vicente M. A.
Martins Fernando
Vitoria Jose
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