|
Circuminscribed polygons in a plane annulusDOI: 10.2478/v10062-008-0005-3 Keywords: Poncelet's porism, isoptics, parallel curves Abstract: Each oval and a natural number n ≥ 3 generate an annulus which possesses the Poncelet's porism property. A necessary and sufficient condition of existence of circuminscribed n-gons in an annulus is given.
|