Clark Kimberling
University of Evansville
and
Peter Moses
Moparmatic Co.
Redditch, Worcestershire, UK
The project includes a research article, to be published elsewhere.
Each curve has all these properties:
* occupies 3-dimensional space; will not fit in a plane
* made from circular arcs
* inscribed on a sphere
* inscribed in the faces of a regular polyhedron
* circumscribes various interesting objects
* closed
* smooth (in the calculus sense).
Each curve is polyhedral polyarc with polysyllabic name and nickname:
Cubic Quadrarc: CQ
Short Cubic Hexarc: SCH
Long Cubic Hexarc: LCH
Short Tetrahedral Quadrarc: STQ
Long Tetrahedral Quadrarc: LTQ
Short Octahedral Hexarc: SOH
Long Octahedral Hexarc: LOH
Short Dodecahedral Hexarc: SDH
Long Dodecahedral Hexarc: LDH
Short Dodecahedral Decarc: SDD
Long Dodecahedral Decarc: LDD
Short Icosahedral Decarc: SID
Long Icosahedral Decarc: LID
Hybrid Octahedral Octarc: SSLLSSLL
Dodecahedral(1,1,1,1,3,3,1,1,1,1,3,3): D(111133111133)
To view a curve, click its name - and then use your browser's BACK to return to this page.
4. Animated Conic Surface of CQ
5. SCH in a Cube, with Inscribed Regular Hexagon
6. LCH in a Cube, with Inscribed Cube Octahedron
7. Animated LCH in a Cube, with Inscribed Cube Octahedron
8. Animated Conic Surface of STQ
9. LOH on Sphere and Octahedron (1st view, "the owl")
10. LOH on Sphere and Octahedron (2nd view)
13. Animated Point on LDD (opaque)
14. Animated LID
15. Animated LID on Truncated Icosahedron
17. Animated Point on SSLLSSLL
20. Animated SOH on Octahedron
22. Animated SDH on Dodecahedron
Curves 1-17 first appeared here on August 5, 2009.
Curves 18-22 first appeared on August 21, 2009.