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We study the homotopy types of certain spaces closely related to the spaces of algebraic (rational) maps from the $m$ dimensional real projective space into the $n$ dimensional complex projective space for $2\leq m\leq 2n$ (we conjecture…

Algebraic Topology · Mathematics 2011-09-05 Andrzej Kozlowski , Kohhei Yamaguchi

For a finite subgroup G in SL(3,C), Bridgeland, King and Reid proved that the moduli space of G-clusters is a crepant resolution of the quotient C^3/G. This paper considers the moduli spaces M_\theta, introduced by Kronheimer and further…

Algebraic Geometry · Mathematics 2011-02-11 Alastair Craw , Akira Ishii

For a noncollapsed Gromov-Hausdorff convergent sequence of Riemannian manifolds with a uniform bound of Ricci curvature, we establish two spectral convergence. One of them is on the Hodge Laplacian acting on differential one-forms. The…

Differential Geometry · Mathematics 2017-06-14 Shouhei Honda

We show that the motive of a Springer fiber is pure Tate. We then consider a category of equivariant Springer motives on the nilpotent cone and construct an equivalence to the derived category of graded modules over the graded affine Hecke…

Representation Theory · Mathematics 2020-08-05 Jens Niklas Eberhardt

The subject of time-band-limiting, originating in signal processing, is dominated by the miracle that a naturally appearing integral operator admits a commuting differential one allowing for a numerically efficient way to compute its…

Classical Analysis and ODEs · Mathematics 2018-10-12 F. Alberto Grünbaum , Inés Pacharoni , Ignacio N. Zurrián

We show that the orthogonal spectral sequence introduced by the second author is strongly convergent in Voevodsky's triangulated category of motives DM over a field k. In the context of the Morel-Voevodsky motivic stable homotopy category…

Algebraic Geometry · Mathematics 2021-11-08 Cesar Galindo , Pablo Pelaez

We introduce a new version of 3d mirror symmetry for toric stacks, inspired by a 3d $\mathcal{N} = 2$ abelian mirror symmetry construction in physics. Given some toric data, we introduce the $K$-theoretic $I$-function with effective level…

Algebraic Geometry · Mathematics 2020-11-17 Yongbin Ruan , Yaoxiong Wen , Zijun Zhou

For a variety with a Whitney stratification by affine spaces, we study categories of motivic sheaves which are constant mixed Tate along the strata. We are particularly interested in those cases where the category of mixed Tate motives over…

Representation Theory · Mathematics 2016-03-02 Wolfgang Soergel , Matthias Wendt

We prove that the moduli spaces of twisted $\mathrm{SL}_n$ and $\mathrm{PGL}_n$-Higgs bundles on a smooth projective curve have the same (stringy) class in the Grothendieck ring of rational Chow motives. On the level of Hodge numbers this…

Algebraic Geometry · Mathematics 2021-03-02 François Loeser , Dimitri Wyss

By a theorem of Mandell-May-Schwede-Shipley the stable homotopy theory of classical $S^1$-spectra is recovered from orthogonal spectra. In this paper general linear, special linear, symplectic, orthogonal and special orthogonal motivic…

Algebraic Geometry · Mathematics 2022-02-18 Grigory Garkusha

We compute the 1-line of stable homotopy groups of motivic spheres over fields of characteristic not two in terms of hermitian and Milnor K-groups. This is achieved by solving questions about convergence and differentials in the slice…

Algebraic Topology · Mathematics 2018-08-15 Oliver Röndigs , Markus Spitzweck , Paul Arne Østvær

In this short note, we prove a comparision theorem between Levine-Serp\'e's equivariant higher Chow groups of an algebraic variety equipped with an action of a finite group and ordinary higher Chow groups of its fixed points. As a…

K-Theory and Homology · Mathematics 2017-07-19 Nguyen Manh Toan

Given a 0-connective motivic spectrum $E \in SH(k)$ over a perfect field k, we determine $h_0$ of the associated motive $M E \in DM(k)$ in terms of $\pi_0 (E)$. Using this we show that if k has finite 2-\'etale cohomological dimension, then…

K-Theory and Homology · Mathematics 2018-07-18 Tom Bachmann

Working over an algebraically closed field $k$ of characteristic $0$, we show that the motivic stable homotopy groups of the sphere spectrum can be determined entirely from the motivic homotopy groups of the $p$-completed sphere spectra and…

Algebraic Topology · Mathematics 2026-03-10 Sebastian Gant , Ben Williams

We give an explicit affine algebraic variety whose coordinate ring is isomorphic (as an algebra with the action of the Weyl group) with the equivariant cohomology of some Springer fibers.

Group Theory · Mathematics 2011-08-23 Shrawan Kumar , Claudio Procesi

We construct two functorial filtrations on the algebraic $K$-theory of schemes of finite type over a field $k$ that may admit arbitrary singularities and may be non-reduced, one called the coniveau filtration, and the other called the…

K-Theory and Homology · Mathematics 2021-12-30 Jinhyun Park , Pablo Pelaez

In this paper, we establish the key properties of the motivic and \'etale Becker-Gottlieb transfer including compatibility with \'etale and Betti realization and show how to obtain various splittings using the transfer.

Algebraic Geometry · Mathematics 2024-04-23 Gunnar Carlsson , Roy Joshua

We show that Lubin-Tate spectra at the prime $2$ are Real oriented and Real Landweber exact. The proof is by application of the Goerss-Hopkins-Miller theorem to algebras with involution. For each height $n$, we compute the entire homotopy…

Algebraic Topology · Mathematics 2020-03-11 Jeremy Hahn , XiaoLin Danny Shi

We introduce a new ascending filtration, that we call the co-radical filtration in analogy with the basic theory of co-algebras, on the Chow groups of pointed smooth projective varieties. In the case of zero-cycles on projective…

Algebraic Geometry · Mathematics 2022-03-18 Charles Vial

We show that for each $k\in\mathbb{N}$, a link $L\subset S^3$ bounds a degree $k$ Whitney tower in the 4-ball if and only if it is \emph{$C_k$-concordant} to the unlink. This means that $L$ is obtained from the unlink by a finite sequence…

Geometric Topology · Mathematics 2025-01-27 James Conant , Rob Schneiderman , Peter Teichner