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Problem corner

Published online by Cambridge University Press:  01 August 2016

Abstract

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Copyright
Copyright © The Mathematical Association 1997

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References

* ‘A plane configuration is a finite system of p points and g straight lines in the plane arranged in such a way that every point is incident to a fixed number γ of straight lines, while every line is incident to a fixed number π of points … The numbers p, g, γ, π are connected by the relation = .’ [Encyclopaedia of Mathematics, Kluwer (1987) pp. 793–794.