Vanishing Next-to-Leading Corrections to the \beta-Function of the SUSY   CP^{N-1} Model in Three Dimensions
  We study the ultraviolet properties of the supersymmetric CP^{N-1} sigma model in three dimensions to next-to-leading order in the 1/N expansion. We calculate the \beta-function to this order and verify that it has no next-to-leading order corrections. 
Takeo Inami, Yorinori Saito and Masayoshi Yamamoto