Sign changes of fourier coefficients of modular forms of half integral   weight, 2
  In this paper, we investigate the sign changes of Fourier coefficients of half-integral weight Hecke eigenforms and give two quantitative results on the number of sign changes. 
Yujiao Jiang, Yuk-Kam Lau, Guangshi L\"u, Emmanuel Royer (LMBP), Jie   Wu (IECL)
math.NT