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On the Steinhaus billiard table problem

Published online by Cambridge University Press:  24 October 2008

H. T. Croft
Affiliation:
Peterhouse, Cambridge, and Trinity College, Cambridge
H. P. F. Swinnerton-Dyer
Affiliation:
Peterhouse, Cambridge, and Trinity College, Cambridge

Extract

Let be a plane closed convex curve, and regard as the boundary of a billiard table. If a perfectly elastic billiard ball is set moving on the table, its path will be a polygon inscribed in ; and this will be closed if and only if the motion is periodic. We seek periodic paths which are triangles.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1963

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References

REFERENCES

(1)Nemytskii, V. V. and Stepanov, V. V.Qualitative theory of differential equations (English translation, Princeton, 1960).Google Scholar
(2)Steinhaus, H.New Scottish Book, Problem 335.Google Scholar