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The purpose of this paper is to prove an equivariant Riemann-Roch theorem for schemes or algebraic spaces with an action of a linear algebraic group $G$. For a $G$-space $X$, this theorem gives an isomorphism between a completion of the…

Algebraic Geometry · Mathematics 2016-09-07 Dan Edidin , William Graham

We prove the Riemann-Roch theorem for homotopy invariant $K$-theory and projective local complete intersection morphisms between finite dimensional noetherian schemes, without smoothness assumptions. We also prove a new Riemann-Roch theorem…

K-Theory and Homology · Mathematics 2016-05-04 Alberto Navarro

Let E be a circle-equivariant complex-orientable cohomology theory. We show that the fixed-point formula applied to the free loopspace of a manifold X can be understood as a Riemann-Roch formula for the quotient of the formal group of E by…

Algebraic Topology · Mathematics 2007-05-23 Matthew Ando , Jack Morava

In this article, we produce Grothendieck-Riemann-Roch formulas for cohomology theories that are not oriented in the classical sense. We then specialize to the case of cohomology theories that admit a so-called symplectic orientation and…

K-Theory and Homology · Mathematics 2024-03-15 Frédéric Déglise , Jean Fasel

Exterior power operations provide an additional structure on K-groups of schemes which lies at the heart of Grothendieck's Riemann-Roch theory. Over the past decades, various authors have constructed such operations on higher K-theory. In…

K-Theory and Homology · Mathematics 2025-01-09 Bernhard Köck , Ferdinando Zanchetta

In the present paper we discuss an independent on the Grothendieck-Sato isomorphism approach to the Riemann-Roch-Hirzebruch formula for an arbitrary differential operator. Instead of the Grothendieck-Sato isomorphism, we use the Topological…

Quantum Algebra · Mathematics 2007-05-23 Boris Feigin , Andrey Losev , Boris Shoikhet

We produce a Grothendieck transformation from bivariant operational $K$-theory to Chow, with a Riemann-Roch formula that generalizes classical Grothendieck-Verdier-Riemann-Roch. We also produce Grothendieck transformations and Riemann-Roch…

Algebraic Geometry · Mathematics 2021-04-21 Dave Anderson , Richard Gonzales , Sam Payne

We define bivariant algebraic K-theory and bivariant derived Chow on the homotopy category of derived schemes over a smooth base. The orientation on the latter corresponds to virtual Gysin homomorphisms. We then provide a morphism between…

Algebraic Geometry · Mathematics 2012-09-03 Parker Lowrey , Timo Schürg

We establish a formula for the classes of certain tori in the Grothendieck ring of varieties, in terms of its lambda-structure. More explicitly, we will see that if L* is the torus of invertible elements in the n-dimensional separable…

Algebraic Geometry · Mathematics 2012-10-08 Karl Rökaeus

In this lecture we review apprearance of the Riemann-Roch Theorem in classical function theory, Algebraic topology, in theory of pseudo-differential operators and finally in noncommutative geometry. We show also it usefulness in many…

Operator Algebras · Mathematics 2007-05-23 Do Ngoc Diep

The Riemann-Roch theorem is of utmost importance in the algebraic geometric theory of compact Riemann surfaces. It tells us how many linearly independent meromorphic functions there are having certain restrictions on their poles. The aim of…

Complex Variables · Mathematics 2007-06-20 A. Lesfari

The goal of this paper is to prove the Riemann-Roch isomorphism for the higher equivariant K-theory of varieties with action of a linear algebraic group.

Algebraic Geometry · Mathematics 2009-06-10 Amalendu Krishna

A power structure over a ring is a method to give sense to expressions of the form $(1+a_1t+a_2t^2+\ldots)^m$, where $a_i$, $i=1, 2,\ldots$, and $m$ are elements of the ring. The (natural) power structure over the Grothendieck ring of…

Algebraic Geometry · Mathematics 2017-05-19 Sabir M. Gusein-Zade , Ignacio Luengo , Alejandro Melle-Hernández

We use the formalism of traces in higher categories to prove a common generalization of the holomorphic Atiyah-Bott fixed point formula and the Grothendieck-Riemann-Roch theorem. The proof is quite different from the original one proposed…

Algebraic Geometry · Mathematics 2019-06-27 Grigory Kondyrev , Artem Prikhodko

We use Grayson's binary multicomplex presentation of algebraic $K$-theory to give a new construction of exterior power operations on the higher $K$-groups of a (quasi-compact) scheme. We show that these operations satisfy the axioms of a…

K-Theory and Homology · Mathematics 2017-06-14 Tom Harris , Bernhard Köck , Lenny Taelman

We investigate the structure of the Klein-Gordon-Fock equation symmetry algebra on pseudo-Riemannian manifolds with motions in the presence of an external electromagnetic field. We show that in the case of an invariant electromagnetic field…

Mathematical Physics · Physics 2014-06-24 Alexey A. Magazev

We deduce the Riemann-Roch type formula expressing the microlocal Euler class of a perfect complex of D-modules in terms of the Chern character of the associated symbol complex and the Todd class of the manifold from the Riemann-Roch type…

Algebraic Geometry · Mathematics 2007-05-23 P. Bressler , R. Nest , B. Tsygan

A 4-dimensional Riemannian manifold M, equipped with an additional tensor structure S, whose fourth power is minus identity, is considered. The structure S has a skew-circulant matrix with respect to some basis of the tangent space at a…

Differential Geometry · Mathematics 2020-07-08 Dimitar Razpopov , Iva Dokuzova

We prove a generalisation of the Grothendieck-Riemann-Roch theorem, which is valid for any proper and flat morphism between noetherian and separated schemes of odd characteristic.

Algebraic Geometry · Mathematics 2023-06-06 Damian Rössler

We construct a model for the space of automorphisms of a connected p-compact group in terms of the space of automorphisms of its maximal torus normalizer and its root datum. As a consequence we show that any homomorphism to the outer…

Algebraic Topology · Mathematics 2014-11-11 Kasper K. S. Andersen , Jesper Grodal
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