2N Noncollinear points determine at least 2N directions

On the combinatorial classification of nondegenerate configurations in the plane

Jacob E. Goodman, Richard Pollack · Journal of Combinatorial Theory Series A · 1980 · 114 citations

Natural Sciences, Mathematics, Combinatorics +12

On the Sets of Directions Determined by <i>n</i> Points

P. R. Scott · American Mathematical Monthly · 1970 · 46 citations

Natural Sciences, Computer Science, Mathematics +4

On the Sets of Directions Determined by n Points

P. R. Scott · American Mathematical Monthly · 1970 · 28 citations

Computing, Computer Science, Mathematics +8

The Directions Determined by <i>n</i> Points in the Plane

G. R. Burton, George Purdy · Journal of the London Mathematical Society · 1979 · 26 citations

Natural Sciences, Mathematics, Geometry +2