arXiv research

Defines new metric space sections with Ahlfors-David regularity.

It is well-known that quasi-isometries between R-trees induce power quasi-symmetric homeomorphisms between their ultrametric end spaces. This paper investigates power quasi-symmetric homeomorphisms between bounded, complete, uniformly perfect, ultrametric spaces (i.e., those ultrametric spaces arising up to similarity …

The Basilica Julia set is universally equivalent to other complex dynamics sets.

We show that any element of the universal Teichmüller space is realized by a unique minimal Lagrangian diffeomorphism from the hyperbolic plane to itself. The proof uses maximal surfaces in the 3-dimensional anti-de Sitter space. We show that, in $AdS^{n+1}$, any subset $E$ of the boundary at infinity which is the boun…

The paper explores additional structures on Morse boundaries to distinguish hyperbolic spaces up to quasi-isometry.

The paper constructs convex subsets in anti-de Sitter space with specific metrics on boundaries.

Fixed points found in Teichmüller space via anti-de Sitter geometry.

We prove that, given an acausal curve $Γ$ in the boundary at infinity of $AdS_{3}$ which is the graph of a quasi-symmetric homeomorphism $φ$, there exists a unique foliation of its domain of dependence $D(Γ)$ by constant mean curvature surfaces with bounded second fundamental form. Moreover, these surfaces provide a fa…

A classical result of Sampson and Schoen-Yau in 1978 states that every diffeomorphism between compact hyperbolic Riemann surfaces is homotopic to an harmonic diffeomorphism. As conjectured by Schoen in 1993 and partially proved by Wan in 1992 and Tam-Wan in 1995, we prove in this article that this theorem generalizes t…

We study the asymmetry of the Lipschitz metric d on Outer space. We introduce an (asymmetric) Finsler norm that induces d. There is an Out(F_n)-invariant potential Ψon Outer space such that when the Lipschitz norm is corrected by the derivative of Ψ, the resulting norm is quasisymmetric. As an application, we give new …

Uniformly perfect Morse boundaries characterize geometric properties of groups.

Stationary measures on hyperbolic surfaces with cusps are singular and stable under quasi-symmetries.

Let $(φ_t)$ be a holomorphic semigroup of the unit disc (i.e., the flow of a semicomplete holomorphic vector field) without fixed points in the unit disc and let $Ω$ be the starlike at infinity domain image of the Koenigs function of $(φ_t)$. In this paper we completely characterize the type of convergence of the orbit…

Study on curvature bounds for specific hypersurfaces in Anti-de Sitter space.

The paper defines a universal Teichmüller space for PGL_d(R) and proves its properties.

Introduces intrinsic Hopf-Lax semigroup linking to intrinsic slope.

Survey of intrinsically linked or knotted graphs.

The paper studies properties of intrinsically Lipschitz constants in metric spaces.

We introduce new sufficient conditions for intrinsic knotting and linking. A graph on n vertices with at least 4n-9 edges is intrinsically linked. A graph on n vertices with at least 5n-14 edges is intrinsically knotted. We also classify graphs that are 0, 1, or 2 edges short of being complete partite graphs with respe…

New graph shows edge deletion/contraction doesn't always result in intrinsically linked graphs.

New method estimates intrinsic dimensionality using angles, not distances.

A directed graph $G$ is $\textit{intrinsically linked}$ if every embedding of that graph contains a non-split link $L$, where each component of $L$ is a consistently oriented cycle in $G$. A $\textit{tournament}$ is a directed graph where each pair of vertices is connected by exactly one directed edge. We consider intr…

We classify graphs that are 0, 1, or 2 edges short of being complete partite graphs with respect to intrinsic linking and intrinsic knotting. In addition, we classify intrinsic knotting of graphs on 8 vertices. For graphs in these families, we verify a conjecture presented in Adams' "The Knot Book": If a vertex is remo…

We show that deleting an edge of a 3-cycle in an intrinsically knotted graph gives an intrinsically linked graph.

Investigates intrinsic Lipschitz sections in nonlinear quotient maps.

We prove that a graph is intrinsically linked in an arbitrary 3-manifold M if and only if it is intrinsically linked in S^3. Also, assuming the Poincare Conjecture, we prove that a graph is intrinsically knotted in M if and only if it is intrinsically knotted in S^3.

Criterion for flat circle bundles using intrinsically harmonic forms.

Recalls intrinsically harmonic forms and open problems.

Paper analyzes a new Hopf-Lax semigroup in metric spaces.

Revisits VIC method to correct intrinsic reward bias in stochastic environments.

New research finds six bipartite intrinsically knotted graphs with 23 edges.

Estimates intrinsic dimension of data for GANs.

We answer the question "Does the Y-triangle move preserve intrinsic knottedness?" in the negative by giving an example of a graph that is obtained from the intrinsically knotted graph K_7 by triangle-Y and Y-triangle moves but is not intrinsically knotted.

Study uniformly differentiable graphs in Carnot groups, proving area formulas.

We focus our attention on the notion of intrinsic Lipschitz graphs, inside a special class of metric spaces i.e. the Carnot groups. More precisely, we provide a characterization of locally intrinsic Lipschitz functions in Carnot groups of step 2 in terms of their intrinsic distributional gradients.

New metric measure space theory for Lipschitz constants.

We list more than 200 new examples of minor minimal intrinsically knotted graphs and describe many more that are intrinsically knotted and likely minor minimal.

Johnson, Kidwell, and Michael showed that intrinsically knotted graphs have at least 21 edges. Also it is known that K7 and the thirteen graphs obtained from K7 by rY moves are intrinsically knotted graphs with 21 edges. We prove that these 14 graphs are the only intrinsically knotted graphs with 21 edges.

Study shows stable graphs in Heisenberg group are essentially planes.

The paper studies maps in the Heisenberg group and their images, called Rickman rugs.

This paper introduces a number of new intrinsically 3-linked graphs through five new constructions. We then prove that intrinsic 3-linkedness is not preserved by $\text{Y}\nabla$ moves. We will see that the graph $M$, which is obtained through a $\text{Y}\nabla$ move on $(PG)^*_*(PG)$, is not intrinsically 3-linked.

Market activity scales near a constant of 0.632 in intrinsic time.

The study shows that the second fundamental form is intrinsic under certain conditions in space forms.

Two new minor minimal intrinsically chiral graphs identified.

We examine graphs that contain a non-trivial link in every embedding into real projective space, using a weaker notion of unlink than was used by Flapan, et al. We call such graphs intrinsically linked in projective space. We fully characterize such graphs with connectivity 0,1 and 2. We also show that only one Peterse…

Exploration in sparse reward reinforcement learning remains an open challenge. Many state-of-the-art methods use intrinsic motivation to complement the sparse extrinsic reward signal, giving the agent more opportunities to receive feedback during exploration. Commonly these signals are added as bonus rewards, which res…

Paper shows intrinsic motivation boosts exploration efficiency in HRL.

We define the intrinsic scale at which a network begins to reveal its identity as the scale at which subgraphs in the network (created by a random walk) are distinguishable from similar sized subgraphs in a perturbed copy of the network. We conduct an extensive study of intrinsic scale for several networks, ranging fro…