Partial result of Yau's Conjecture of the first eigenvalue in unit   sphere $\mathbb{S}^{n+1}(1)$
  In this paper, we partially solve Yau' Conjecture of the first eigenvalue of an embedded compact minimal hypersurface of unit sphere $\mathbb{S}^{n+1}(1)$, i.e., Corollary 1.2. In particular, Corollary 1.3 proves that the condition $\int_{\Omega_{1}}|\nabla u|^{2}=(n+1)\int_{\Omega_{1}}u^{2}$ is naturally true and meaningful in Corollary 1.2. 
Zhongyang Sun
math.DG