Results 281 to 290 of about 8,891,192 (320)

Tumors evade immune cytotoxicity by altering the surface topology of NK cells

Nature Immunology, 2023
Xiaohu Zheng, Zhuanghao Hou, Y. Qian, Yongwei Zhang, Quanwei Cui, Xuben Wang, Yiqing Shen, Zhen-Bang Liu, Yonggang Zhou, Binqing Fu, R. Sun, Z. Tian, Guangming Huang, Haiming Wei   +13 more
semanticscholar   +1 more source

Surface topology

2011
Abstract This chapter discusses the topological classification of surfaces, and outlines an approach to a proof.
openaire   +1 more source

On Topological Classification of A-Diffeomorphisms of Surfaces

Journal of Dynamical and Control Systems, 2000
This paper is a review of results obtained by the author and related to the topological classification of discrete dynamical systems (cascades) defined on an orientable smooth closed surface \({\mathcal A}_g\) of genus \(g\geq 0\). Topics are: 1) topological classification of one-dimensional basic sets via automorphisms of fundamental groups, 2 ...
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Topological H-Surfaces

Canadian Journal of Mathematics, 1965
An H-space is a topological space T for which it is possible to define a continuous binary compositionwith the following properties: there exists a homotopy unit, i.e.
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On-surface synthesis of graphene nanoribbons with zigzag edge topology

Nature, 2015
Graphene-based nanostructures exhibit electronic properties that are not present in extended graphene. For example, quantum confinement in carbon nanotubes and armchair graphene nanoribbons leads to the opening of substantial electronic bandgaps that are
P. Ruffieux, Shiyong Wang, Bo Yang, C. Sánchez-Sánchez, Jia Liu, T. Dienel, Leopold Talirz, Prashant P. Shinde, C. Pignedoli, D. Passerone, Tim Dumslaff, Xinliang Feng, K. Müllen, R. Fasel   +13 more
semanticscholar   +1 more source

The Topological Theory of Frechet Surfaces

The Annals of Mathematics, 1944
The object of this paper is the study of surfaces. As the title indicates we do not propose to consider all the mathematical entities to which the term surface has been applied, and, in fact, our first obligation is to define precisely the objects of our attention.
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Exotic topology on the surface

Science, 2018
Topological Matter Analyzing the spatial symmetries of three-dimensional (3D) crystal structures has led to the discovery of exotic types of quasiparticles and topologically nontrivial materials. Wieder et al. focus on the symmetry groups of 2D surfaces of 3D materials—the so-called wallpaper groups—and find that some of them allow for an additional ...
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The Topology of Elliptic Surfaces

1994
In this chapter, we shall complete the classical (i.e., pre-gauge theory) analysis of the C ∞-topology of elliptic surfaces. In particular we shall compare deformation equivalence and diffeomorphism in all cases except when the fundamental group of the elliptic surface is finite cyclic.
Robert Friedman, John W. Morgan
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Topology driven approximation to rational surface-surface intersection via interval algebraic topology analysis

ACM Transactions on Graphics, 2023
Jin-San Cheng, Bingwei Zhang, yikun xiao
exaly  

Topology-controllable Implicit Surface Reconstruction Based on Persistent Homology

CAD Computer Aided Design, 2022
Zhetong Dong, Hongwei Lin
exaly