Additional
Information: Open research-level problems in Geometry. Recreational problems and puzzles have their own categories.
Open Problems Sites:
Open Problems from the Geometry Junkyard Open Problems from the Geometry Junkyard: Compiled by David Eppstein of the University of California at Irvine. (Open Problems) http://www.ics.uci.edu/~eppstein/junkyard/open.html
Open Problems on Discrete and Computational Geometry Open Problems on Discrete and Computational Geometry: Compiled by Jorge Urrutia, University of Ottawa. (Open Problems) http://www.csi.uottawa.ca/~jorge/openprob/
Steiner Trees Steiner Trees: Open Problems with Steiner Trees, maintained by Joe Ganley. (Open Problems) http://ganley.org/steiner/open.html
Open Problems Open Problems: Collected by Jeff Erickson. Mainly in geometry. (Open Problems) http://compgeom.cs.uiuc.edu/~jeffe/open/
The Open Problems Project The Open Problems Project: A project to record open problems of interest to researchers in computational geometry and related fields. (Open Problems) http://www.cs.smith.edu/~orourke/TOPP/
Additional
Information: Open research-level problems in Geometry. Recreational problems and puzzles have their own categories.
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