ISSN:
1572-9168
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mathematics
Notes:
Abstract We consider the following question: Given a family A of sets for which A-blocking sets exist, is it true that any bijection of the set of points which preserves the family of A-blocking sets must preserve A? Using a variet of techniques, we show that the answer is ‘yes’ in many cases, for example, when A is the family of subspaces of fixed dimension in a projective space, lines in an affine plane, or blocks of a symmetric design, but that it is ‘no’ for lines of an arbitrary linear space.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00182909
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