Non-Abelian Stokes Theorem for Loop Variables Associated with Nontrivial   Loops
  The non-Abelian Stokes theorem for loop variables associated with nontrivial loops (knots and links) is derived. It is shown that a loop variable is in general different from unity even if the field strength vanishes everywhere on the surface surrounded by the loop. 
M. Hirayama(Toyama U.), M. Kanno(Toyama U.), M. Ueno(Toyama U.) and H.   Yamakoshi(Toyama-NCT)