IJPAM: Volume 93, No. 6 (2014)
ON THE STRATIFICATION BY X-RANKS OF A PROJECTIVE
SPACE (MAXIMAL AND SUBMAXIMAL X-RANKS)
SPACE (MAXIMAL AND SUBMAXIMAL X-RANKS)
E. Ballico
Department of Mathematics
University of Trento
38 123 Povo (Trento) - Via Sommarive, 14, ITALY
Department of Mathematics
University of Trento
38 123 Povo (Trento) - Via Sommarive, 14, ITALY
Abstract. Let
be an integral and non-degenerate variety. For each
the X-rank
of
is the minimal cardinality of a subset of
whose linear span contains
. For each
set
. We prove that if
is the maximum of all
and
, then
.
Received: February 25, 2014
AMS Subject Classification: 14N05, 15A69
Key Words and Phrases: X-rank, open rank, secant variety
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DOI: 10.12732/ijpam.v93i6.5 How to cite this paper?
Source: International Journal of Pure and Applied Mathematics
ISSN printed version: 1311-8080
ISSN on-line version: 1314-3395
Year: 2014
Volume: 93
Issue: 6
Pages: 799 - 802
