Zentralblatt MATH

Publications of (and about) Paul Erdös

Zbl.No:  219.05006
Autor:  Erdös, Paul; Purdy, G.
Title:  Some extremal problems in geometry (In English)
Source:  J. Comb. Theory, Ser. A 10, 246-252 (1971).
Review:  The authors investigate several geometrical problems of a combinatorial flavour. Let be given n points in the plane. Then they determine at most 4n5/2 triangles which have the same non-zero area. On the other hand one can find n points in the plane which determine cn2 log log n triangles having the same non zero area.
Several other related results are proved and many unsolved problems are stated.
Classif.:  * 05B25 Finite geometries (combinatorics)

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