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{{COI|date=November 2010}}
{{COI|date=November 2010}}


In [[convex geometry]], the '''equichordal point problem''' asks whether there exists a curve with two [[equichordal points]]. The problem was originally posed in 1916 by Fujiwara<ref name="Fujiwara">M. Fujiwara. Über die Mittelkurve zweier geschlossenen konvexen Curven in Bezug auf einen Punkt. Tôhoku Math J., 10:99–103, 1916</ref>, and solved by [[Marek Rychlik]] in 1996<ref name="The_Proof">[[Marek R. Rychlik]], A complete solution to the equichordal point problem of Fujiwara, Blaschke, Rothe and Weizenböck, [[Inventiones Mathematicae]], 1997, Volume 129, Number 1, Pages 141–212</ref>. The answer in the negative is the subject of [[Rychlik's theorem]].
In [[convex geometry]], the '''equichordal point problem''' asks whether there exists a [[convex curve]] with two [[equichordal points]]. The problem was originally posed in 1916 by Fujiwara<ref name="Fujiwara">M. Fujiwara. Über die Mittelkurve zweier geschlossenen konvexen Curven in Bezug auf einen Punkt. Tôhoku Math J., 10:99–103, 1916</ref>, and solved by [[Marek Rychlik]] in 1996<ref name="The_Proof">[[Marek R. Rychlik]], A complete solution to the equichordal point problem of Fujiwara, Blaschke, Rothe and Weizenböck, [[Inventiones Mathematicae]], 1997, Volume 129, Number 1, Pages 141–212</ref>. The answer in the negative is the subject of [[Rychlik's theorem]].


== See also ==
== See also ==

Revision as of 04:57, 26 November 2010

In convex geometry, the equichordal point problem asks whether there exists a convex curve with two equichordal points. The problem was originally posed in 1916 by Fujiwara[1], and solved by Marek Rychlik in 1996[2]. The answer in the negative is the subject of Rychlik's theorem.

See also

  1. Rychlik's theorem
  2. Chordal problem

References

  1. ^ M. Fujiwara. Über die Mittelkurve zweier geschlossenen konvexen Curven in Bezug auf einen Punkt. Tôhoku Math J., 10:99–103, 1916
  2. ^ Marek R. Rychlik, A complete solution to the equichordal point problem of Fujiwara, Blaschke, Rothe and Weizenböck, Inventiones Mathematicae, 1997, Volume 129, Number 1, Pages 141–212