math

• YouTube - The Klein Bottle
  darrellp
  May 27 2008
  

  Good demo of why a klein bottle is a kind of reversed torus and why it's the same as two mobius strips glued together.

  Quoted: The Klein Bottle is a surface on which you can move from outside to inside without crossing an edge. This shows that inside and outside are not universal con...

  1 FaverViewed: 10 Times
• Welcome to Gathering for Gardner, Math, Puzzles....
  royleban - Jun 02 2008
  
  1 FaverViewed: 8 Times
• ベクトル解析公式集
  geophysics - Apr 12 2006
  
  1 FaverViewed: 33 Times