Titre du sujet
The Osculating Circumference Problem
ISISS M. Casagrande (Pieve di Soligo)
The aim of the article is to study the osculating circumference i.e. the circumference which best approximates the graph of a curve at one of its points. We will define this circumference and we will describe several methods to find it. Finally we will introduce the notions of round points and crossing points, points of the curve where the circumference has interesting properties.