On affine groups admitting invariant two-point sets
A two-point set is a subset of the plane which meets every line in exactly two points. We discuss previous work on the topological symmetries of a two-point set, and show that there exist subgroups of S<sup>1</sup> which do not leave any two-point set invariant. Further, we show that two...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2009
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| Subjects: |