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Volume 22, Issue 92026-07-13
  • News and notes: An exclusive club
    Wikipedia Co-Founder Larry Sanger gets a community ban for canvassing.
  • In the media: Battle for a soul – who won?
    Commissars, winners and losers, blocks or bans, a Wiki red card, social engineering on wikis, and Swift action!
Wednesday, July 22, 202606:32 (UTC)
Andy Burnham in 2026
Andy Burnham
Featured picture for November 9, 2007
Tesseract
A 3D projection of a tesseract performing a simple rotation about a plane which bisects the figure from front-left to back-right and top to bottom. Also called 8-cell or octachoron, a tesseract is the four-dimensional analog of the cube, where motion along the fourth dimension is often a representation for bounded transformations of the cube through time. The tesseract is to the cube as the cube is to the square. The tesseract is the four-dimensional hypercube, or 4-cube.Image credit: Jason Hise