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We show that the natural "convolution" on the space of smooth, even, translation-invariant convex valuations on a euclidean space $V$, obtained by intertwining the product and the duality transform of S. Alesker, may be expressed in terms…

Differential Geometry · Mathematics 2008-03-27 Andreas Bernig , Joseph H. G. Fu

It is shown that Alesker's solution of McMullen's conjecture implies the following stronger version of the conjecture: Every continuous, translation invariant, $k$-homogeneous valuation on convex bodies in $\mathbb{R}^n$ can be approximated…

Metric Geometry · Mathematics 2024-10-16 Jonas Knoerr

Alesker has proved the existence of a remarkable isomorphism of the space of translation-invariant smooth valuations that has the same functorial properties as the classical Fourier transform. In this paper, we show how to directly describe…

Classical Analysis and ODEs · Mathematics 2023-09-14 Dmitry Faifman , Thomas Wannerer

The Alesker-Bernig-Schuster theorem asserts that each irreducible representation of the special orthogonal group appears with multiplicity at most one as a subrepresentation of the space of continuous translation-invariant valuations with…

Differential Geometry · Mathematics 2022-02-22 Jan Kotrbatý , Thomas Wannerer

This is the first part of a series of articles where we are going to develop theory of valuations on manifolds generalizing the classical theory of continuous valuations on convex subsets of a linear space. In this article we still work…

Metric Geometry · Mathematics 2011-11-16 Semyon Alesker

The Alesker product turns the space of smooth translation-invariant valuations on convex bodies into a commutative associative unital algebra, satisfying Poincar\'e duality and the hard Lefschetz theorem. In this article, a version of the…

Metric Geometry · Mathematics 2021-08-10 Jan Kotrbatý

We give a characterization of smooth, rotation and dually epi-translation invariant valuations and use this result to obtain a new proof of the Hadwiger theorem on convex functions. We also give a description of the construction of the…

Metric Geometry · Mathematics 2024-10-16 Jonas Knoerr

A classification of SL$(n)$ invariant valuations on the space of convex polytopes in $R^n$ without any continuity assumptions is established. A corresponding result is obtained on the space of convex polytopes in $R^n$ that contain the…

Metric Geometry · Mathematics 2019-10-08 Monika Ludwig , Matthias Reitzner

A complete classification of all zonal, continuous, and translation invariant valuations on convex bodies is established. The valuations obtained are expressed as principal value integrals with respect to the area measures. The convergence…

Metric Geometry · Mathematics 2024-09-13 Jonas Knoerr

The decomposition of the space of continuous and translation invariant valuations into a sum of SO(n) irreducible subspaces is obtained. A reformulation of this result in terms of a Hadwiger type theorem for continuous translation invariant…

Differential Geometry · Mathematics 2011-08-16 Semyon Alesker , Andreas Bernig , Franz E. Schuster

The algebra of smooth translation-invariant valuations on convex bodies, introduced by S.Alesker in the early 2000s, was in part proved and in part conjectured to satisfy properties formally analogous to those of the cohomology ring of a…

Differential Geometry · Mathematics 2024-02-15 Andreas Bernig , Jan Kotrbatý , Thomas Wannerer

For valuations on convex bodies in Euclidean spaces, there is by now a long series of characterization and classification theorems. The classical template is Hadwiger's theorem, saying that every rigid motion invariant, continuous,…

Metric Geometry · Mathematics 2016-09-02 Daniel Hug , Rolf Schneider

Let $V$ be a finite dimensional real vector space. In the article we construct an isomorphism between the space of smooth translation invariant valuations on convex subsets of $V$ and the space of such valuations (twisted by densities) on…

Metric Geometry · Mathematics 2013-01-31 Semyon Alesker

A new integral representation of smooth translation invariant and rotation equivariant even Minkowski valuations is established. Explicit formulas relating previously obtained descriptions of such valuations with the new more accessible one…

Metric Geometry · Mathematics 2014-11-10 Franz E. Schuster , Thomas Wannerer

An introduction to geometric valuation theory is given. The focus is on classification results for $\operatorname{SL}(n)$ invariant and rigid motion invariant valuations on convex bodies and on convex functions.

Metric Geometry · Mathematics 2024-01-31 Monika Ludwig , Fabian Mussnig

We prove new kinematic formulas for tensor valuations and simplify previously known Crofton formulas by using the recently developed algebraic theory of translation invariant valuations. The heart of the paper is the computation of the…

Differential Geometry · Mathematics 2018-07-09 Andreas Bernig , Daniel Hug

We show an analogue of the Klain-Schneider theorem for valuations that are invariant under rotations around a fixed axis, called zonal. Using this, we establish a new integral representation of zonal valuations involving mixed area measures…

Metric Geometry · Mathematics 2024-10-29 Leo Brauner , Georg C. Hofstätter , Oscar Ortega-Moreno

We study translation invariant, real-valued valuations on the class of convex polytopes in Euclidean space and discuss which continuity properties are sufficient for an extension of such valuations to all convex bodies. For this purpose, we…

Metric Geometry · Mathematics 2014-09-03 Wolfram Hinderer , Daniel Hug , Wolfgang Weil

We obtain new general results on the structure of the space of translation invariant continuous valuations on convex sets (a version of the hard Lefschetz theorem). Using these and our previous results we obtain explicit characterization of…

Metric Geometry · Mathematics 2007-05-23 Semyon Alesker

We study the properties of the multiplicative structure on valuations on convex sets. We prove a new version of the hard Lefschetz theorem for even translation invariant continuous valuations, and discuss related problems of integral…

Metric Geometry · Mathematics 2007-05-23 Semyon Alesker
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