Abstract
A boundary point of R is a point in S, such that arbitrarily near to it (in the sense of the Euclidean distance in the space S) there exist points belonging to R and points not belonging to R. [Notation as in § 1 of Lecture XIII.] A boundary point of R may not belong to P; for example, the zero matrix does not belong to P, yet it is a boundary point of R, because λT (λ arbitrary positive) belongs to R if T does, and we may let λ tend to zero.
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© 1989 Springer-Verlag Berlin Heidelberg
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Siegel, C.L., Chandrasekharan, K. (1989). Lecture XIV. In: Lectures on the Geometry of Numbers. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-08287-4_14
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DOI: https://doi.org/10.1007/978-3-662-08287-4_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-08076-0
Online ISBN: 978-3-662-08287-4
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