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A new scheme is proposed for dealing with the problem of singularities in General Relativity. The proposal is, however, much more general than this. It can be used to deal with manifolds of any dimension which are endowed with nothing more…

广义相对论与量子宇宙学 · 物理学 2010-12-03 Susan M. Scott , Peter Szekeres

Singularities play an important role in General Relativity and have been shown to be an inherent feature of most physically reasonable space-times. Despite this, there are many aspects of singularities that are not qualitatively or…

广义相对论与量子宇宙学 · 物理学 2014-08-20 Richard A. Barry , Susan M. Scott

We define a special network that exhibits the large embeddings in any class of similar algebras. With the aid of this network, we introduce a notion of distance that conceivably counts the minimum number of dissimilarities, in a sense,…

综合数学 · 数学 2021-12-24 Tuğba Aslan , Mohamed Khaled , Gergely Székely

The {\em abstract boundary\/} (or {\em {\em a\/}-boundary\/}) of Scott and Szekeres \cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional, paracompact, connected, Hausdorff, $C^\infty$-manifold (without a boundary in the usual…

广义相对论与量子宇宙学 · 物理学 2008-02-03 Christopher J. Fama , Susan M. Scott

We present herewith certain thoughts on the important subject of nowadays physics, pertaining to the so-called ``singularities'', that emanated from looking at the theme in terms of ADG (: abstract differential geometry). Thus, according to…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Anastasios Mallios

The problem of classifying boundary points of space-time, for example singularities, regular points and points at infinity, is an unexpectedly subtle one. Due to the fact that whether or not two boundary points are identified or even…

广义相对论与量子宇宙学 · 物理学 2018-11-14 Ingrid Irmer

This paper is devoted to the study of the embeddings of a complex submanifold $S$ inside a larger complex manifold $M$; in particular, we are interested in comparing the embedding of $S$ in $M$ with the embedding of $S$ as the zero section…

复变函数 · 数学 2007-05-23 Marco Abate , Filippo Bracci , Francesca Tovena

For non-compact manifolds with boundary we prove that bounded geometry defined by coordinate-free curvature bounds is equivalent to bounded geometry defined using bounds on the metric tensor in geodesic coordinates. We produce a nice atlas…

微分几何 · 数学 2018-11-28 Thomas Schick

In this paper an analysis of the geometrical construction of the AdS/CFT Correspondence is made. A geometrical definition of the configuration manifold and the boundary manifold in terms of the conformal compactification scheme is given. As…

广义相对论与量子宇宙学 · 物理学 2016-11-29 Miguel Angel Martin Contreras , Jose Maria Rolando Roldan

Researchers have recently suggested that models share common representations. In our work, we find numerous geometric similarities across the token embeddings of large language models. First, we find ``global'' similarities: token…

计算与语言 · 计算机科学 2025-07-16 Andrew Lee , Melanie Weber , Fernanda Viégas , Martin Wattenberg

The abstract boundary construction of Scott and Szekeres provides a `boundary' for any n-dimensional, paracompact, connected, Hausdorff, smooth manifold. Singularities may then be defined as objects within this boundary. In a previous paper…

广义相对论与量子宇宙学 · 物理学 2014-08-20 Richard A. Barry , Susan M. Scott

Several important algorithms for machine learning and data analysis use pairwise distances as input. On Riemannian manifolds these distances may be prohibitively costly to compute, in particular for large datasets. To tackle this problem,…

微分几何 · 数学 2019-04-29 Philipp Harms , Elodie Maignant , Stefan Schlager

Warped embeddings from a lower dimensional Einstein manifold into a higher dimensional one are analyzed. Explicit solutions for the embedding metrics are obtained for all cases of codimension 1 embeddings and some of the codimension n>1…

高能物理 - 理论 · 物理学 2014-11-20 Huan-Xiong Yang , Liu Zhao

This writeup describes ongoing work on designing and testing a certain family of correspondences between compact metric spaces that we call \emph{embedding-projection correspondences} (EPCs). Of particular interest are EPCs between spheres…

度量几何 · 数学 2024-07-04 Facundo Mémoli , Zane T. Smith

The bulk-edge correspondence for topological quantum liquids states that the spectrum of the reduced density matrix of a large subregion reproduces the thermal spectrum of a physical edge. This correspondence suggests an intricate…

强关联电子 · 物理学 2012-10-03 Brian Swingle , T. Senthil

This survey/expository article covers a variety of topics related to the "topology at infinity" of noncompact manifolds and complexes. In manifold topology and geometric group theory, the most important noncompact spaces are often…

几何拓扑 · 数学 2021-03-02 Craig R. Guilbault

This paper contains a set of lecture notes on manifolds with boundary and corners, with particular attention to the space of quantum states. A geometrically inspired way of dealing with these kind of manifolds is presented,and explicit…

数学物理 · 物理学 2018-02-07 Florio Maria Ciaglia , Fabio Di Cosmo , Marco Laudato , Giuseppe Marmo

It is well-understood that different algorithms, training processes, and corpora produce different word embeddings. However, less is known about the relation between different embedding spaces, i.e. how far different sets of embeddings…

计算与语言 · 计算机科学 2020-05-19 Xuhui Zhou , Zaixiang Zheng , Shujian Huang

A self-contained introduction is presented of the notion of the (abstract) differentiable manifold and its tangent vector fields. The way in which elementary topological ideas stimulated the passage from Euclidean (vector) spaces and linear…

数学物理 · 物理学 2012-04-12 K. Kanakoglou

Recent work has explored methods for learning continuous vector space word representations reflecting the underlying semantics of words. Simple vector space arithmetic using cosine distances has been shown to capture certain types of…

计算与语言 · 计算机科学 2015-07-29 Sridhar Mahadevan , Sarath Chandar
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