Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Hieu Doan"'
Autor:
Hieu Doan
Publikováno v:
AIMS Mathematics, Vol 6, Iss 7, Pp 7895-7908 (2021)
In this paper, we prove some generalizations of Kannan-type fixed point theorems for singlevalued and multivalued mappings defined on a complete strong b- metric space in terms of a Suzuki-type contraction. Our results extend a result of Górnicki [1
Externí odkaz:
https://doaj.org/article/9d21fa558d1c40058b1b40a8bce6c7cb
Autor:
Hieu, Doan The
In this paper, we study $\lambda$-submanifolds of arbitrary codimensions in Gauss spaces. These submanifolds can be seen as natural generalizations of self-shrinker and $\lambda$-hypersurfaces. Using a divergence type theorem and some Simons' type id
Externí odkaz:
http://arxiv.org/abs/2304.09710
Autor:
Hieu, Doan The, Duyen, Nguyen Thi My
In this paper, we generalize some halfspace type theorems for self-shrinkers of codimension 1 to the case of arbitrary codimension.
Comment: 11 pages, typos corrected, a little bit change, comments are welcome
Comment: 11 pages, typos corrected, a little bit change, comments are welcome
Externí odkaz:
http://arxiv.org/abs/2012.04509
Autor:
Hieu, Doan The
A weighted area estimate for entire graphs with bounded weighted mean curvature in Gauss space is given by a simple proof. Bernstein type theorems for self shrinkers (\cite {wa}) as well as for graphic $\lambda$-hypersurfaces (\cite{ chwe2}) follow i
Externí odkaz:
http://arxiv.org/abs/1803.00278
Autor:
Hieu, Doan The, Nam, Tran Le
We classify (spacelike or timelike) surfaces of revolution with zero $f$-mean curvature in $\Bbb G^2\times\Bbb R_1,$ the Lorentz-Minkowski 3-space $\Bbb R^3_1$ endowed with the Gaussian-Euclidean density $e^{-f(x,y,z)}=\frac 1{2\pi}e^{-\frac{x^2+y^2}
Externí odkaz:
http://arxiv.org/abs/1701.01972
Autor:
Hieu, Doan The, Nam, Tran Le
In this paper, we classify the class of constant weighted curvature curves in the plane with a log-linear density, or in other words, classify all traveling curved fronts with a constant forcing term in $\Bbb R^2.$ The classification gives some inter
Externí odkaz:
http://arxiv.org/abs/1312.7388
Autor:
Hieu, Doan The, Nam, Tran Le
Based on a calibration argument, we prove a Bernstein type theorem for entire minimal graphs over Gauss space $\mathbb{G}^n$ by a simple proof.
Externí odkaz:
http://arxiv.org/abs/1312.7387
Autor:
Van Cuong, Dang, Hieu, Doan The
To study spacelike surfaces of codimension two in the Lorentz-Minkowski space $\Bbb R^{n+1}_1,$ we construct a pair of maps whose values are in $HS_r:=H_+^n(\textbf v,1)\cap \{x_{n+1}=r\},$ called $\textbf n_r^{\pm}$-Gauss maps. It is showed that the
Externí odkaz:
http://arxiv.org/abs/1102.2527
Autor:
Hieu, Doan The, Tuan, Huynh Dinh
We study on what conditions on $B_k,$ \ a linear transformation of rank $r$ \label{form} T(A)=\sum_{k=1}^r\tr(AB_k)U_k where $U_k,\ k=1,2,..., r$ are linear independent and all positive definite; is positive definite preserving. We give some first re
Externí odkaz:
http://arxiv.org/abs/1011.3739
Base on some simple facts of Hadamard product, characterizations of positive definite preserving linear transformations on real symmetric matrix spaces with an additional assumption "$\ra T(E_{ii})=1, i=1,2,..., n$" or "$T(A)>0\to A> 0$", were given.
Externí odkaz:
http://arxiv.org/abs/1008.1347