Abstract
We study the partial spontaneous breaking of a global supersymmetry algebra. A formalism developed by Volkov for nonlinearly realized spacetime symmetries is very useful. The case analyzed in detail is two-dimensional (2,2) supersymmetry with a central charge spontaneously broken to (0,2). This algebra, which is realized in supersymmetric Nielsen-Olesen strings, leads to the Green-Schwarz superstring action.
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