2026-04-17T14:00:33Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4450502024-11-18T01:27:26Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Yuan, Pengfei author Llibre, Jaume author 2020 A tangential trapezoid, also called a circumscribed trapezoid, is a trapezoid whose four sides are all tangent to a circle within the trapezoid: the in-circle or inscribed circle. In this paper we classify all planar four-body central configurations, where the four bodies are at the vertices of a tangential trapezoid. Convex central configuration Four-body problem Tangential trapezoid Tangential trapezoid central configurations