| − | Tesseract-The Fourth demensional cube; the tesseract | + | Tesseract-The Fourth demensional cube; the tesseract is a cube suspended in another cube with all the vertices or corners. The tesseract was used in Madelaine L'Engel's A Wrinkle In Time as a wrinkle in time [[Image:http://mathworld.wolfram.com/images/eps-gif/TesseractProjection_1000.gif]] |