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VOLUME 40 (1984) | ISSUE 4 | PAGE 155
Harmonic superspace: key to N = 2 supersymmetry theories
The concept of a harmonic N = 2 superspace with additional coordinates related to the SU(2)/U(1) sphere is introduced. This concept leads to an adequate geometric description of the N = 2 theories of matter, the Yang-Mills theory, and supergravity in terms of superfields without coupling. A new effect has been discovered: the unboundedness of the number of gauge and auxiliary degrees of freedom.