PORTUGALIAE MATHEMATICA Vol. 62, No. 3, pp. 269288 (2005) 

Curve shortening and the fourvertex theoremBernd SüssmannRobert Bosch GmbH,Postfach 300220, 70442 Stuttgart  GERMANY Abstract: This paper shows how the fourvertex theorem, a famous theorem in differential geometry, can be proven by using curve shortening. Keywords: fourvertex theorem; curve shortening. Classification (MSC2000): 53A04, 53A35, 53C44. Full text of the article:
Electronic version published on: 7 Mar 2008.
© 2005 Sociedade Portuguesa de Matemática
