{"version":"1.0","type":"link","title":"Unduloid - Newikis","description":"In geometry, an unduloid, or onduloid, is a surface with constant nonzero mean curvature obtained as a surface of revolution of an elliptic catenary: that is, by rolling an ellipse along a fixed line, tracing the focus, and revolving the resulting curve around the line. In 1841 Delaunay proved that…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/e/e6/Unduloid.svg/1280px-Unduloid.svg.png","thumbnail_width":1280,"thumbnail_height":1000}