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We prove that the moduli space of stable maps of degree 2 to the moduli space of rank 2 stable bundles of fixed determinant O(-x) over a smooth projective curve of genus g>2 has two irre- ducible components which intersect transversely. One…

Algebraic Geometry · Mathematics 2007-05-23 Young-Hoon Kiem

This replacement corrects statement and proof of the main result. Also, a section on the universal Abel-Jacobi map has been added.

alg-geom · Mathematics 2008-02-03 Eduard Looijenga

Let $U_{d,n}^*$ be the universal degree $d$ hypersurface in $\mathbb{P}^n$. In this paper we compute the stable (with respect to $d$) cohomology of $U_{d,n}^*$ and give a geometric description of the stable classes. This builds on work of…

Algebraic Topology · Mathematics 2023-10-04 Ishan Banerjee

We study some interesting hypersurfaces that naturally arise when studying the period map on the moduli space of hypersurfaces, in the context of Sung Gi Park's recent work on studying the GIT moduli space of hypersurfaces via the minimal…

Algebraic Geometry · Mathematics 2026-05-01 Hyunsuk Kim

We introduce the Cuntz-Thomsen picture of $\mathcal{C}$-equivariant Kasparov theory, denoted $\mathrm{KK}^\mathcal{C}$, for a unitary tensor category $\mathcal{C}$ with countably many isomorphism classes of simple objects. We use this…

Operator Algebras · Mathematics 2026-03-16 Sergio Girón Pacheco , Kan Kitamura , Robert Neagu

We obtain a formula for structure constants of certain variant form of Bott-Samelson classes for equivariant oriented cohomology of flag varieties. Specializing to singular cohomology/K-theory, we recover formulas of structure constants of…

Algebraic Geometry · Mathematics 2024-04-15 Rebecca Goldin , Changlong Zhong

We construct a zig-zag from the once delooped space of pseudoisotopies of a closed $2n$-disc to the once looped algebraic $K$-theory space of the integers and show that the maps involved are $p$-locally $(2n-4)$-connected for $n>3$ and…

Algebraic Topology · Mathematics 2022-03-01 Manuel Krannich

This paper deals with the construction of a suitable topological $K$-theory capable of classifying topological phases of dynamically stable systems described by gapped $\eta$-self-adjoint operators on a Krein space with indefinite metric…

Mathematical Physics · Physics 2018-10-10 Giuseppe De Nittis , Kiyonori Gomi

We classify, in a group theoretical manner, the BPS configurations in the multiple M2-brane theory recently proposed by Bagger and Lambert. We present three types of BPS equations preserving various fractions of supersymmetries: in the…

High Energy Physics - Theory · Physics 2014-11-18 Imtak Jeon , Jongwook Kim , Nakwoo Kim , Sang-Woo Kim , Jeong-Hyuck Park

We propose a construction of a stable category for any pretorsion theory in a lextensive category. We prove the universal property of the stable category, that extends previous results obtained for the stable category of internal preorders…

Category Theory · Mathematics 2023-01-16 Francis Borceux , Federico Campanini , Marino Gran

We show that an invertible bilateral weighted shift is strongly structurally stable if and only if it has the shadowing property. We also exhibit a K{\"o}the sequence space supporting a frequently hypercyclic weighted shift, but no chaotic…

Functional Analysis · Mathematics 2021-01-11 Frédéric Bayart

This paper investigates stable cohomotopy groups in codimensions two and three from complementary algebraic and geometric viewpoints. For general CW complexes, we give a complete characterization of stable cohomotopy in codimension two and…

Algebraic Topology · Mathematics 2026-05-14 Pengcheng Li , Jianzhong Pan , Jie Wu

This paper contains results on stable bundles of rank 2 with space of sections of dimension 4 on a smooth irreducible projective algebraic curve $C$. There is a known lower bound on the degree for the existence of such bundles; the main…

Algebraic Geometry · Mathematics 2014-01-31 I. Grzegorczyk , V. Mercat , P. E. Newstead

The full description of the stable factor-representations of the infinite hyperoctahedral group up to quasi-equivalence obtained.

Representation Theory · Mathematics 2024-03-12 N. I. Nessonov

We study GIT stability of divisors in products of projective spaces. We first construct a finite set of one-parameter subgroups sufficient to determine the stability of the GIT quotient. In addition, we characterise all maximal orbits of…

Algebraic Geometry · Mathematics 2023-12-07 Ioannis Karagiorgis , Theresa A. Ortscheidt , Theodoros S. Papazachariou

The paper investigates a significant part of the automorphic, in fact of the so-called Eisenstein cohomology of split odd orthogonal groups over Q. The main result provides a description of residual and regular Eisenstein cohomology classes…

Number Theory · Mathematics 2011-06-07 G. Gotsbacher , H. Grobner

We prove that every smooth divisor in $\mathbb{P}^1\times\mathbb{P}^1\times\mathbb{P}^2$ of degree $(1,1,2)$ is K-stable.

Algebraic Geometry · Mathematics 2023-02-03 Ivan Cheltsov , Kento Fujita , Takashi Kishimoto , Takuzo Okada

In this paper, we study combinatorial properties of stable curves. To the dual graph of any nodal curve, it is naturally associated a group, which is the group of components of the N\'eron model of the generalized Jacobian of the curve. We…

Algebraic Geometry · Mathematics 2022-08-09 Simone Busonero , Margarida Melo , Lidia Stoppino

We show that any separable stable Banach space can be represented as a group of isometries on a separable reflexive Banach space, which extends a result of S. Guerre and M. Levy. As a consequence, we can then represent homeomorphically its…

Functional Analysis · Mathematics 2009-09-25 Fouad Chaatit

We show that continuous bounded group cohomology stabilizes along the sequences of real or complex symplectic Lie groups, and deduce that bounded group cohomology stabilizes along sequences of lattices in them, such as…

Group Theory · Mathematics 2019-02-05 Carlos De la Cruz Mengual , Tobias Hartnick