30 Aug
2010
30 Aug
'10
8:29 p.m.
Here's a possibly harder 3D visualization challenge: Draw a picture of a (topological) Moebius band in 3-space whose boundary is a perfect circle. (This can be done by continuously deforming the usual version.) --Dan -------------- Stephen wrote: << Here's an exercise in 3D visualization. Given a point P, is it possible to construct FIVE rays coming out from P such that every ray makes an obtuse angle (>90 degrees) with every other one? (That's 10 angles that must be obtuse.) Explain your answer.
_____________________________________________________________________ "It don't mean a thing if it ain't got that certain je ne sais quoi." --Peter Schickele