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We show the existence and uniqueness of invariant foliations about invariant tori in analytic discrete-time dynamical systems. The parametrisation method is used prove the result. Our theory is a foundational block of data-driven model…

Dynamical Systems · Mathematics 2024-03-25 Robert Szalai

It is well-known that the reduced Floer homology of a rational homology sphere admitting a taut foliation does not vanish. We strengthen this by showing that (when thought of as an $\mathbb{F}[U]$-module) it also admits a direct…

Geometric Topology · Mathematics 2023-09-06 Francesco Lin

We introduce a moduli space of ``complete quasimaps'' to $\mathsf{Bl}_{\mathbb{P}^s}(\mathbb{P}^r)$. The construction, following previous work for curves on projective spaces, essentially proceeds by blowing up Ciocan-Fontanine--Kim's space…

Algebraic Geometry · Mathematics 2026-04-30 Alessio Cela , Carl Lian

Quasi-elliptic cohomology is a variant of elliptic cohomology theories. It is the orbifold K-theory of a space of constant loops. For global quotient orbifolds, it can be expressed in terms of equivariant K-theories. Thus, the constructions…

Algebraic Topology · Mathematics 2018-08-27 Zhen Huan

We exhibit a closed hyperbolic 3-manifold which satisfies a very strong form of Thurston's Virtual Fibration Conjecture. In particular, this manifold has finite covers which fiber over the circle in arbitrarily many ways. More precisely, it…

Geometric Topology · Mathematics 2010-06-01 Nathan M. Dunfield , Dinakar Ramakrishnan

This is the second of series of papers on the study of foliations in the setting of derived algebraic geometry based on the central notion of derived foliation. We introduce sheaf-like coefficients for derived foliations, called…

Algebraic Geometry · Mathematics 2020-07-21 Bertrand Toën , Gabriele Vezzosi

We show that if M is a hyperbolic 3-manifold which admits a quasigeodesic flow, then pi_1(M) acts faithfully on a universal circle by homeomorphisms, and preserves a pair of invariant laminations of this circle. As a corollary, we show that…

Geometric Topology · Mathematics 2009-04-22 Danny Calegari

Let $M$ be a Riemannian manifold of dimension $n+1$ with smooth boundary and $p\in \partial M$. We prove that there exists a smooth foliation around $p$ whose leaves are submanifolds of dimension $n$, constant mean curvature and its arrive…

Differential Geometry · Mathematics 2019-04-29 J. Fabio Montenegro

With a view toward sub-Riemannian geometry, we introduce and study H-type foliations. These structures are natural generalizations of K-contact geometries which encompass as special cases K-contact manifolds, twistor spaces, 3K contact…

Differential Geometry · Mathematics 2023-01-03 Fabrice Baudoin , Erlend Grong , Gianmarco Vega-Molino , Luca Rizzi

Quasi-Sturmian words, which are infinite words with factor complexity eventually $n+c$ share many properties with Sturmian words. In this paper, we study the quasi-Sturmian colorings on regular trees. There are two different types, bounded…

Dynamical Systems · Mathematics 2024-03-20 Dong Han Kim , Seul Bee Lee , Seonhee Lim , Deokwon Sim

In this paper, we introduce the concept of residuated implications derived from quasi-overlap functions on lattices and prove some related properties. In addition, we formalized the residuation principle for the case of quasi-overlap…

Logic in Computer Science · Computer Science 2020-02-28 Rui Paiva , Benjamín Bedregal , Regivan Santiago

In this note we study a new cohomology attached to a function along the leaves of complex foliations. We also explain how this cohomology depends on the function and we study a relative cohomology and a Mayer-Vietoris sequence related to…

Differential Geometry · Mathematics 2010-12-07 Cristian Ida

We investigate modules over "systematic" rings. Such rings are "almost graded" and have appeared under various names in the literature; they are special cases of the G-systems of Grzeszczuk. We analyse their K-theory in the presence of…

K-Theory and Homology · Mathematics 2019-09-12 Thomas Huettemann , Zuhong Zhang

We prove a reduction of singularities for pairs of foliations by blowing-up, and then investigate the analytic classification of the reduced models. Those reduced pairs of regular foliations are well understood. The case of a regular and a…

Classical Analysis and ODEs · Mathematics 2020-08-04 Adjaratou Arame Diaw , Frank Loray

We prove a version the local Reeb-Thurston stability theorem for symplectic foliations.

Symplectic Geometry · Mathematics 2013-07-17 Marius Crainic , Ioan Marcut

We consider compatibility conditions between Poisson and Riemannian structures on smooth manifolds by means of a contravariant partially complex structure, or $f$-structure, introducing the notion of (almost) K\"ahler--Poisson manifolds. In…

Symplectic Geometry · Mathematics 2017-09-11 Nicolás Martínez Alba , Andrés Vargas

We provide analogues for non-orientable surfaces with or without boundary or punctures of several basic theorems in the setting of the Thurston theory of surfaces which were developed so far only in the case of orientable surfaces. Namely,…

Geometric Topology · Mathematics 2013-10-02 Athanase Papadopoulos , Robert C. Penner

We define partial quasi-morphisms on the group of Hamiltonian diffeomorphisms of the cotangent bundle using the spectral invariants in Lagrangian Floer homology with conormal boundary conditions, where the product compatible with the PSS…

Symplectic Geometry · Mathematics 2021-04-13 Jelena Katić , Darko Milinković , Jovana Nikolić

We prove that $\mathbb Q$-Gorenstein quasi-$F$-regular singularities are klt. To this end, we shall introduce quasi-test ideals.

Algebraic Geometry · Mathematics 2026-02-17 Tatsuro Kawakami , Teppei Takamatsu , Hiromu Tanaka , Jakub Witaszek , Fuetaro Yobuko , Shou Yoshikawa

We characterize compact eight-manifolds M which arise as internal spaces in N=1 flux compactifications of M-theory down to AdS3 using the theory of foliations, for the case when the internal part of the supersymmetry generator is everywhere…

High Energy Physics - Theory · Physics 2015-02-11 Elena Mirela Babalic , Calin Iuliu Lazaroiu