2N Noncollinear points determine at least 2N directions

Author:

Ungar Peter

Publisher

Elsevier BV

Subject

Computational Theory and Mathematics,Discrete Mathematics and Combinatorics,Theoretical Computer Science

Reference4 articles.

1. The directions determined by n points in the plane;Burton;J. London Math. Soc.,1979

2. On the combinatorial classification of nondegenerate configurations in the plane;Goodman;J. Combin. Theory Ser. A,1980

3. A combinatorial perspective on some problems in geometry;Goodman,1981

4. On the sets of directions determined by n points;Scott;Amer. Math. Monthly,1970

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