Twisted Homotopy: A Group Theoretic Approach
  After summarising the physical approach leading to twisted homotopy and after developing the cohomological approach further with respect to our previous work we propose a third alternative approach to twisted homotopy based on group theoretic considerations. In this approach the fundamental group $\Pi (m) $ isomorphic to Z which describes homotopic loops on the punctured plane$ R^2/(0) $ is enhanced in a special way to the continuous SO(2) group . This is performed by letting the parameter of the group $ m \rightarrow \lambda $ while keeping its generator unchanged .It is shown that such non-trivial procedure has the effect of introducing well defined self-interactions among loops which are at the basis of twisted homotopy where the angle $ \lambda $ plays the role of the self coupling constant.   KEYWORDS: Homotopy, Group Theory, Quantum Mechanics   MSC:55Q35; PACS:02.20.Fh ; 03.65.Fd 
M.Mekhfi