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We show that real Deligne cohomology of a complex manifold arises locally as a topological vector space completion of the analytic Lie groupoid of holomorphic vector bundles. Thus Beilinson's regulator arises naturally as a comparison map…

K-Theory and Homology · Mathematics 2017-09-11 J. P. Pridham

We discuss several approaches to motivic complexes and explicit constructions of the regulator maps from the motivic complexes to Deligne complexes.

Number Theory · Mathematics 2007-05-23 A. B. Goncharov

We define a regulator map from the weight n polylogarithmic motivic complex to the weight n Deligne complex of an algebraic variety X. The regulator map is constructed explicitly via the classical polylogarithms with some funny combinations…

Algebraic Geometry · Mathematics 2007-05-23 A. B. Goncharov

In 1986, Spencer Bloch gave an abstract definition of a (regulator) map from higher Chow groups to Deligne-Beilinson cohomology. This map can be defined on the underlying complexes, and Kerr, Lewis and M\"uller-Stach gave an explicit…

Algebraic Geometry · Mathematics 2014-10-20 Thomas Weißschuh

We give a certain method for computations of real regulator on K_1 of elliptic surfaces. We also give an examples of a regulator indecomposable element for an elliptic surface with an arbitrary large p_g.

Algebraic Geometry · Mathematics 2013-05-01 Masanori Asakura

This informal note collects key results and open problems on the (co)homology of the Deligne-Mumford moduli spaces of real marked rational curves. The open problems are both of topological nature, aiming to investigate the (co)homology of…

Algebraic Geometry · Mathematics 2024-04-02 Aleksey Zinger

We show how to use equidimensional algebraic correspondences between complex algebraic varieties to construct pull-backs and transforms of certain classes of geometric currents. Using this construction we produce explicit formulas at the…

Algebraic Geometry · Mathematics 2019-03-28 Pedro F. dos Santos , Robert M. Hardt , Paulo Lima-Filho

We prove that the Beilinson regulator, which is a map from $K$-theory to absolute Hodge cohomology of a smooth variety, admits a refinement to a map of $E_\infty$-ring spectra in the sense of algebraic topology. To this end we exhibit…

Algebraic Geometry · Mathematics 2018-05-30 Ulrich Bunke , Thomas Nikolaus , Georg Tamme

We define a Real version of smooth Deligne cohomology for manifolds with involution which interpolates between equivariant sheaf cohomology and smooth imaginary-valued forms. Our main result is a classification of Real line bundles with…

Differential Geometry · Mathematics 2023-12-11 Peter Marius Flydal , Gereon Quick , Eirik Eik Svanes

Let $X$ be a variety defined over a local field $K$ of mixed characteristic $(0,p)$ with a totally degenerate reduction in the sense of Raskind and Xarles. Generalizing earlier work of Raskind and Xarles and relying on some conjectures we…

Algebraic Geometry · Mathematics 2019-10-16 Amnon Besser , Wayne Raskind

We construct a rigid analytical regulator for the K_2 of Mumford curves, a non-archimedean analogue of the complex analytical Beilinson-Bloch-Deligne regulator.

Number Theory · Mathematics 2009-12-17 Ambrus Pal

We study formal deformations of hom-Lie-Rinehart algebras. The associated deformation cohomology that controls deformations is constructed using multiderivations of hom-Lie-Rinehart algebras.

Rings and Algebras · Mathematics 2020-07-21 Satyendra Kumar Mishra , Ashis Mandal

We evaluate a rigid analytical analogue of the Beilinson-Bloch-Deligne regulator on certain explicit elements in the K_2 of Drinfeld modular curves, constructed from analogues of modular units, and relate its value to special values of…

Number Theory · Mathematics 2009-12-17 Ambrus Pal

Let X be a separated scheme of finite type over a field k and D a non-reduced effective Cartier divisor on it. We attach to the pair (X, D) a cycle complex with modulus, whose homotopy groups - called higher Chow groups with modulus -…

Algebraic Geometry · Mathematics 2019-10-23 Federico Binda , Shuji Saito

In this paper we show that the regulator defined by Goncharov from higher algebraic Chow groups to Deligne-Beilinson cohomology agrees with Beilinson's regulator. We give a direct comparison of Goncharov's regulator to the construction…

Algebraic Geometry · Mathematics 2009-09-30 J. I. Burgos Gil , E. Feliu , Y. Takeda

We show how regulator constants of a finitely generated $\mathbb{Z}[G]$-module can be related to $G$-cohomology, where $G$ is a finite group. We then derive consequences of such relation for modules naturally arising in number theory, such…

Number Theory · Mathematics 2026-03-03 Luca Caputo

It is a long-established and heavily-used fact that the integral cohomology ring of the Deligne-Mumford moduli space of (complex) rational curves is the polynomial ring on the boundary divisors modulo the ideal generated by the obvious…

Algebraic Geometry · Mathematics 2024-01-18 Xujia Chen , Penka Georgieva , Aleksey Zinger

We give an explicit formula for the Deligne pairing for a proper and flat morphisms $f:X\to S$ of schemes, in terms of the determinant of cohomology. The whole construction is justified by an analogy with the intersection theory on…

Algebraic Geometry · Mathematics 2021-06-14 Paolo Dolce

We show that a complex structure on a nilpotent almost abelian real Lie algebra is unique if it exists. As a consequence, we get full control over the cohomology and deformations of almost abelian complex nilmanifolds.

Differential Geometry · Mathematics 2025-02-06 Adrián Andrada , Romina M. Arroyo , María L. Barberis , Sönke Rollenske , Konstantin Wehler

We explain a formalism of regular holonomic $D$-modules for algebraic geometers using the distinguished triangles associated with algebraic local cohomology together with meromorphic Deligne extensions of local systems as well as the dual…

Algebraic Geometry · Mathematics 2022-01-06 Morihiko Saito
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