ANGEWANDTE MATHEMATIK UND INFORMATIK UNIVERSIT ¨ AT ZU K ¨ OLN Report No. 92.113 The Traveling Salesman Problem by Michael J¨ unger Gerhard Reinelt Giovanni Rinaldi Revised Version of February 1994 Institut f¨ ur Informatik UNIVERSIT ¨ AT ZU K ¨ OLN Pohligstraße 1 D-50969 K¨ oln