From any configuration of finitely many points in Euclidean three-space, Atiyah constructed a determinant and conjectured that it was always non-zero. Atiyah and Sutcliffe (hep-th/0105179) amass a great deal of evidence it its favour. In this article we prove the conjecture for the case of four points.
We present a direct proof of the second conjecture made by M. Atiyah and P. Sutcliffe for the case of convex quadrilaterals. Unlike previous work on this conjecture, our proof does not require any computer aided computations. The new proof relies on a new geometric inequality proved recently by the author.
Verification and Strengthening of the Atiyah--Sutcliffe Conjectures for Several Types of Configurations
2001年,M。F.阿蒂亚提出了一个猜想C1,后来与P.萨特克利夫提出了两个更强的猜想C2和C3。受物理学(量子力学的自旋统计定理)的启发,这些几何图形被几何定义为欧几里得三维空间中的任何点的配置。对$n = 3, 4$和一般的$n$证明了猜想C1,但仅对某些特殊构形(M. F. Atiyah,M. Eastwood and P. Norbury,D. Jakoković).有趣的是,猜想C2(以及更强的猜想C3)甚至对于平面上的任意四个点都还没有得到证明。到目前为止,我们已经验证了平行四边形,循环四边形和一些无限族四面体的结构C2和C3。我们还提出了一个加强猜想C3的配置的四点(四点猜想)。对于几乎共线的配置(除了一个点以外的所有点都在一条线上),我们提出了几个新的示意图(一些对称函数),这意味着C2和C3。通过使用多Schur函数的计算,我们可以对我们的结构进行高达$n=9$的验证。我们还可以验证更强的猜想,即对于具有二面角对称性的非平面构型,该猜想意味着C2。最后,我们提到,通过最小化几何定义的能量,在这些图表中计算,人们可以连接到一些复杂的物理理论,如Skyrmions和Fullerenes。
Atiyah's Minkowski Space Conjecture Fails for Every $n\ge3$
Shanghai Institute for Mathematics and Interdisciplinary Sciences (SIMIS)(上海数学与交叉学科研究院);Research Institute of Intelligent Complex Systems, Fudan University(复旦大学智能复杂系统研究院)
We use the generalized Minkowski billiard characterization of the EHZ-capacity of Lagrangian products in order to reprove that the $4$-dimensional Viterbo conjecture holds for the Lagrangian products (any triangle/parallelogram in $\mathbb{R}^2$)$\times$(any convex body in $\mathbb{R}^2$) and extend this fact to the Lagrangian products (any trapezoid in $\mathbb{R}^2$)$\times$(any convex body in $\mathbb{R}^2$). Based on this analysis, we classify equality cases of this version of Viterbo's conjecture and prove that most of them can be proven to be symplectomorphic to Euclidean balls. As a by-…
A finite subset of a Euclidean space is called an $s$-distance set if there exist exactly $s$ values of the Euclidean distances between two distinct points in the set. In this paper, we prove that the maximum cardinality among all 5-distance sets in $\mathbb{R}^3$ is 20, and every $5$-distance set in $\mathbb{R}^3$ with $20$ points is similar to the vertex set of a regular dodecahedron.
We prove the following comparison theorem for metrics with nonnegative scalar curvature, also known as the dihedral rigidity conjecture by Gromov: for $n\le 7$, if an $n$-dimensional prism has nonnegative scalar curvature and weakly mean convex faces, then its dihedral angle cannot be everywhere not larger than its Euclidean model, unless it is isometric to an Euclidean prism. The proof relies on constructing certain free boundary minimal hypersurface in a Riemannian polyhedron, and extending a dimension descent idea of Schoen-Yau. Our result is a localization of the positive mass theorem.
We study the geometric significance of Leinster's notion of magnitude for a compact metric space. For a smooth, compact domain in an odd-dimensional Euclidean space, we show that the asymptotic expansion of the magnitude function at infinity determines the Willmore energy of the boundary. This disproves the Leinster-Willerton conjecture for a compact convex body in all odd dimensions.