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We study Lefschetz fixed point formulas for constructible sheaves with higher-dimensional fixed point sets. Under fairly weak assumptions, we prove that the local contributions from them are expressed by some constructible functions…

Algebraic Geometry · Mathematics 2015-05-26 Yuichi Ike , Yutaka Matsui , Kiyoshi Takeuchi

We study the Lefschetz fixed point formula for constructible sheaves with higher-dimensional fixed point sets. We give another proof to the explicit description of Lefschetz cycles in our previous paper. For this purpose, we introduce a new…

Algebraic Geometry · Mathematics 2017-05-08 Yuichi Ike

We introduce two novel complementary notions of the Lefschetz number for a functor from a finite acyclic category to itself and we prove a Lefschetz fixed-object theorem and a Lefschetz fixed-morphism theorem. In order to do so, we use the…

Algebraic Topology · Mathematics 2024-04-11 Samuel Castelo-Mourelle , Enrique Macías-Virgós , David Mosquera-Lois

For a smooth morphism $f: X \longrightarrow \Sigma$ of real analytic manifolds and an $\mathbb{R}$-constructible sheaf $F$ on $X$ satisfying some condition, we define a family of Lagrangian cycles parameterized by $\Sigma$ that we call the…

Algebraic Geometry · Mathematics 2026-03-17 Ren Fernandes , Kazuki Kudomi , Kiyoshi Takeuchi

We introduce a theory of integration with respect to the fixed point index, offering a substantial improvement over previous approaches based on the Lefschetz number. This framework eliminates several restrictive assumptions -- such as the…

Algebraic Topology · Mathematics 2025-06-02 Jesús A. Álvarez López , Alejandro O. Majadas-Moure , David Mosquera-Lois

A Lefschetz formula is given that relates loops in a regular finite graph to traces of a certain representation. As an application the poles of the Ihara/Bass zeta function are expressed as dimensions of global section spaces of locally…

Number Theory · Mathematics 2007-05-23 Anton Deitmar

We formulate a conjectural Lefschetz formula for locally symmetric spaces of finite volume. The formula can be verified in the compact case and for Riemann surfaces.

Differential Geometry · Mathematics 2007-05-23 Anton Deitmar

We consider 2-local geometries and other subgroup complexes for sporadic simple groups. For six groups, the fixed point set of a noncentral involution is shown to be equivariantly homotopy equivalent to a standard geometry for the component…

Group Theory · Mathematics 2010-08-24 John Maginnis , Silvia Onofrei

We define a new geometric object--the stack of local systems with restricted variation. We formulate a version of the categorical geometric Langlands conjecture that makes sense for any constructible sheaf theory (such as l-adic sheaves).…

Algebraic Geometry · Mathematics 2022-04-07 D. Arinkin , D. Gaitsgory , D. Kazhdan , S. Raskin , N. Rozenblyum , Y. Varshavsky

Geometric properties of the fixed point set $Fix(f)$ of a self-mapping $f$ on a metric or a generalized metric space is an attractive issue. The set $Fix(f)$ can contain a geometric figure (a circle, an ellipse, etc.) or it can be a…

Metric Geometry · Mathematics 2025-06-09 Nihal Özgür , Nihal Taş

We obtain an equivariant index theorem, or Lefschetz fixed-point formula, for isometries from complete Riemannian manifolds to themselves. The fixed-point set of such an isometry may be noncompact. We build on techniques developed by Roe.…

Differential Geometry · Mathematics 2024-01-10 Peter Hochs

Fr\'echet regression extends the principles of linear regression to accommodate responses valued in generic metric spaces. While this approach has primarily focused on exploring relationships between Euclidean predictors and non-Euclidean…

Statistics Theory · Mathematics 2026-02-25 Chang Jun Im , Jeong Min Jeon

We present a constructive proof of Tychonoff's fixed point theorem in a locally convex space for sequentially locally non-constant functions, As a corollary to this theorem we also present Schauder's fixed point theorem in a Banach space…

Logic · Mathematics 2011-05-19 Yasuhito Tanaka

A general Lefschetz formula for the geodesic action on locally symmetric spaces is proven.

Differential Geometry · Mathematics 2007-05-23 Anton Deitmar

In this paper, we investigate the cycles and fixed point sets of compositions of resolvents using Attouch Th\'era duality. We demonstrate that the cycles defined by the resolvent operators can be formulated in Hilbert space as the solution…

Functional Analysis · Mathematics 2024-06-04 Salihah Thabet Alwadani

We adapt the definition of the Vietoris map to the framework of finite topological spaces and we prove some coincidence theorems. From them, we deduce a Lefschetz fixed point theorem for multivalued maps that improves recent results in the…

Dynamical Systems · Mathematics 2020-10-27 Pedro J. Chocano , Manuel A. Morón , Francisco R. Ruiz del Portal

We propose some variants of Lefschetz fixed point theorem for Fourier-Mukai functors on a smooth projective algebraic variety. Independently we also suggest a similar theorem for endo-functors on the category of perfect modules over a…

Algebraic Geometry · Mathematics 2011-05-10 Valery A. Lunts

We study the existence of rational points on modular curves of $\cal{D}$-elliptic sheaves over local fields and the structure of special fibres of these curves. We discuss some applications which include finding presentations for arithmetic…

Number Theory · Mathematics 2010-06-17 Mihran Papikian

The introduced notion of locally-periodic two-scale convergence allows to average a wider range of microstructures, compared to the periodic one. The compactness theorem for the locally-periodic two-scale convergence and the…

Analysis of PDEs · Mathematics 2012-09-19 Mariya Ptashnyk

We prove two general factorization theorems for fixed-point invariants of fibrations: one for the Lefschetz number and one for the Reidemeister trace. These theorems imply the familiar multiplicativity results for the Lefschetz and Nielsen…

Algebraic Topology · Mathematics 2014-10-01 Kate Ponto , Michael Shulman
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