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This paper contains a description of one connected component of the space of stability conditions on the bounded derived category of coherent sheaves on a complex algebraic K3 surface.

Algebraic Geometry · Mathematics 2007-05-23 Tom Bridgeland

We classify p-toral subgroups of U(n) that can have non-contractible fixed points under the action of U(n) on the complex of partitions of complex n-space into mutually orthogonal subspaces.

Algebraic Topology · Mathematics 2017-10-19 Julia E. Bergner , Ruth Joachimi , Kathryn Lesh , Vesna Stojanoska , Kirsten Wickelgren

Motivated by Maulik-Okounkov stable maps associated to quiver varieties, we define and construct algebraic stable maps on tensor products of representations in the category O of the Borel subalgebra of an arbitrary untwisted quantum affine…

Representation Theory · Mathematics 2024-10-30 David Hernandez

We calculate the ordinary $C_2$-cohomology, with Burnside ring coefficients, of $BU(2)$, the classifying space for $C_2$-equivariant complex 2-plane bundles, using an extended grading that allows us to capture a more natural set of…

Algebraic Topology · Mathematics 2024-11-12 Steven R. Costenoble , Thomas Hudson

A moduli space of stable quotients of the rank n trivial sheaf on stable curves is introduced. Over nonsingular curves, the moduli space is Grothendieck's Quot scheme. Over nodal curves, a relative construction is made to keep the torsion…

Algebraic Geometry · Mathematics 2014-11-11 A. Marian , D. Oprea , R. Pandharipande

We describe the fundamental groups of ordered and unordered k point sets in complex projective space of dimension n generating a projective subspace of dimension i. We apply these to study connectivity of more complicated configurations of…

Geometric Topology · Mathematics 2010-02-12 Barbu Berceanu , Saima Parveen

Let K be the product O(n_1) x O(n_2) x ... x O(n_r) of orthogonal groups. Let V the r-fold tensor product of defining representations of each orthogonal factor. We compute a stable formula for the dimension of the K-invariant algebra of…

Representation Theory · Mathematics 2012-09-25 Lauren Kelly Williams

We give a construction of the moduli space of stable maps to the classifying stack B\mu_r of a cyclic group by a sequence of r-th root constructions on M_{0, n}. We prove a closed formula for the total Chern class of \mu_r-eigenspaces of…

Algebraic Geometry · Mathematics 2012-04-06 Arend Bayer , Charles Cadman

We prove that a certain type of stably causal space times are bi continuous posets.

Mathematical Physics · Physics 2014-04-17 Neda Ebrahimi

We prove that the rational cohomology of the space of non-singular complex homogeneous polynomials of degree d in a fixed number of variables stabilizes to the cohomology of the general linear group for d sufficiently large.

Algebraic Geometry · Mathematics 2014-08-11 Orsola Tommasi

We introduce the notion of stable representations, -- it is a new class of the representations of a certain class of groups which defined with positive definite functions which generalize the classical notion of the characters (or trace).…

Functional Analysis · Mathematics 2012-04-03 A. Vershik , N. Nessonov

We study structural properties and the harmonic analysis of discrete subgroups of the Euclidean group. In particular, we 1. obtain an efficient description of their dual space, 2. develop Fourier analysis methods for periodic mappings on…

Group Theory · Mathematics 2021-07-21 Bernd Schmidt , Martin Steinbach

The paper investigates the stability properties of restrictions of irreducible representations of the symmetric group to the hyperoctahedral subgroup. A stability result is obtained, analogous to the classical Murnaghan theorem on the…

Representation Theory · Mathematics 2026-04-22 Sergey Davydov

We describe the $C_2$-equivariant homotopy type of the space of commuting n-tuples in the stable unitary group in terms of Real K-theory. The result is used to give a complete calculation of the homotopy groups of the space of commuting…

Algebraic Topology · Mathematics 2019-04-24 Simon Gritschacher , Markus Hausmann

We introduce an algebra of Schouten-commuting holomorphic polyvector fields on the moduli space of stable G-bundles over a curve by using invariant forms on the Lie algebra. The generators begin in degree three -- we prove a vanishing…

Algebraic Geometry · Mathematics 2015-03-17 Nigel Hitchin

We show in this work that homology in degree d of a congruence group, in a very general framework, defines a weakly polynomial functor of degree at most 2d and we describe this functor modulo polynomial functors of smaller degree. Our main…

K-Theory and Homology · Mathematics 2017-12-12 Aurélien Djament

The problem of homological stability helps us to catch the structure of group homology. We calculate homological stability of special orthogonal groups, and we also calculate the stability of orthogonal groups with determinant-twisted…

K-Theory and Homology · Mathematics 2015-11-04 Masayuki Nakada

We express the real connective $K$ theory groups of the quaternion QL group of order $2^j\ge8$ in terms of the representation theory of by showing $ko_{4k-1}(BQL)=KSp(S^{4k+3}/\tau QL)$ where $tau$ is any fixed point free representation of…

Differential Geometry · Mathematics 2007-05-23 E. Barrera-Yanez , P. Gilkey

We prove geometric and cohomological stabilization results for the universal smooth degree $d$ hypersurface section of a fixed smooth projective variety as $d$ goes to infinity. We show that relative configuration spaces of the universal…

Algebraic Geometry · Mathematics 2020-03-26 Sean Howe

This paper examines and strengthens the Cuntz-Thomsen picture of equivariant Kasparov theory for arbitrary second-countable locally compact groups, in which elements are given by certain pairs of cocycle representations between C*-dynamical…

Operator Algebras · Mathematics 2025-03-25 James Gabe , Gábor Szabó