1 citations · 1 across the 8 of their papers we have counts for
8 papers
Entire -maximal graphs in the lorentzian product
H. V. Q. An, D. V. Cuong, N. T. M. Duyen +2
In the lorentzian product we give a comparison between the -volume of an entire -maximal graph and the -volume of the hyperbolic under th…
-valued Gauss maps and umbilic spacelike surfaces of codimension two
Dang Van Cuong, Doan The Hieu
To study spacelike surfaces of codimension two in the Lorentz-Minkowski space we construct a pair of maps whose values are in $HS_r:=H_+^n(\textbf v,1)\cap \{x_{n…
On positive definite preserving linear transformations of rank on real symmetric matrices
Doan The Hieu, Huynh Dinh Tuan
We study on what conditions on \ a linear transformation of rank \label{form} T(A)=\sum_{k=1}^r\tr(AB_k)U_k where are linear independent and all pos…
Ruled minimal surfaces in with density
Nguyen Minh Hoang, Doan The Hieu
We classify ruled minimal surfaces in with density It is showed that there is no noncylindrical ruled minimal surface and there is a family of cylindrical ruled m…
Analytic Extension of a maximal surface in along its boudary
Doan The Hieu, Nguyen Van Hanh
We prove that a maximal surface in Lorentz-Minkowski space can be extended analytically along its boundary if the boundary lies in a plane meeting the surface at a const…
On the Four Vertex Theorem on planes with radial density
Doan The Hieu, Tran Le Nam
It is showed that on a plane with a radial density the Four Vertex Theorem holds for the class of all simple closed curves if and only if the density is constant. But for the class…