Sharp spherically averaged Strichartz estimates for the Schr\"odinger   equation
  We prove generalized Strichartz estimates with weaker angular integrability for the Schr\"odinger equation. Our estimates are sharp except some endpoints. Then we apply these new estimates to prove the scattering for the 3D Zakharov system with small data in the energy space with low angular regularity. Our results improve the results obtained recently in \cite{GLNW}. 
Zihua Guo
math.AP math.CA