The field theoretical approach to duality in the superconducting phase
transition is reviewed. Emphasis is given to the scaling behavior, and recent
results are discussed.Comment: ws LaTex, 9 pages, 1 figure; published in "Fluctuating Paths and
  Fields", Festschrift dedicated to Hagen Kleinert on the occasion of his 60th
  birthday, Edited by W. Janke et al. (World Scientific, Singapore, 2001