摘要：If $\Delta u=0$ in $\Omega\subset\mathbb{R}^n (n\geq2)$, then for $p>\frac{n-2}{n-1}$, $|Du|^p$ is subharmonic.Proof: For $|Du|(x_0)\neq 0$, we have \ 阅读全文

摘要：Here, we only consider the codimension one case. Let $F: M\rightarrow R^{n+1}$. Now we calculate the normal variation of the volume 。 Let$\phi\in C^\i 阅读全文

摘要：In the following, we will give some explanation of the calculation of Riemannian geometry and geometry measure theory. As for our interest, we only co 阅读全文

摘要：It is customary to call the function function defined on $U$ by $\nabla_{\frac{\partial}{\partial x_i}}\frac{\partial}{\partial x_j}=\sum\limits_k\Gam 阅读全文