Results 11 to 20 of about 79,797 (290)
Stratification of singular hyperkähler quotients
Complex Manifolds, 2022 Hyperkähler quotients by non-free actions are typically singular, but are nevertheless partitioned into smooth hyperkähler manifolds. We show that these partitions are topological stratifications, in a strong sense.
Mayrand Maxence
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Nonlinear Model Reduction by Moment-Matching for a Point Absorber Wave Energy Conversion System
Journal of Marine Science and Engineering, 2022 This paper presents a data-driven model reduction by moment-matching approach to construct control-oriented models for a point absorber device. The methodology chosen and developed generates models which are input-to-state linear, with any nonlinear ...
Guglielmo Papini +4 more
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Entropy, 2016 We introduce the symplectic structure of information geometry based on Souriau’s Lie group thermodynamics model, with a covariant definition of Gibbs equilibrium via invariances through co-adjoint action of a group on its moment space, defining physical ...
Frédéric Barbaresco
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Bott-Samelson Varieties, Subword Complexes and Brick Polytopes [PDF]
Discrete Mathematics & Theoretical Computer Science, 2014 Bott-Samelson varieties factor the flag variety $G/B$ into a product of $\mathbb{C}\mathbb{P}^1$'s with a map into $G/B$. These varieties are mostly studied in the case in which the map into $G/B$ is birational; however in this paper we study fibers of ...
Laura Escobar
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Regional parent flood frequency distributions in Europe – Part 2: Climate and scale controls [PDF]
Hydrology and Earth System Sciences, 2014 This study aims to better understand the effect of catchment scale and climate on the statistical properties of regional flood frequency distributions. A database of L-moment ratios of annual maximum series (AMS) of peak discharges from Austria, Italy
J. L. Salinas +3 more
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Poincaré Inequalities and Moment Maps [PDF]
Annales de la Faculté des sciences de Toulouse : Mathématiques, 2014 We discuss a method for obtaining Poincaré-type inequalities on arbitrary convex bodies in ℝ n . Our technique involves a dual version of Bochner’s formula and a certain moment map, and it also applies to some non-convex sets. In particular, we generalize the central limit theorem for convex bodies to a class of non-convex domains, including the unit ...
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Journal of Differential Geometry, 2000 A Lie group G in a group pair (D,G), integrating a Lie algebra g in a Manin pair (d,g) has a quasi-Poisson structure. We define the quasi-Poisson actions of such Lie groups G, that generalize the Poisson actions of Poisson Lie groups. We define and study the moment maps for those quasi-Poisson actions which are quasi-hamiltonian. These moment maps take
Alekseev, Anton +1 more
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Moment Maps and Equivariant Volumes [PDF]
Acta Mathematica Sinica, English Series, 2007 misprints corrected, some new results ...
DELLA VEDOVA, ALBERTO, PAOLETTI, ROBERTO
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The linearisation of maps in data assimilation [PDF]
Tellus: Series A, Dynamic Meteorology and Oceanography, 2013 For the purpose of linearising maps in data assimilation, the tangent-linear approximation is often used. We compare this with the use of the ‘best linear’ approximation, which is the linear map that minimises the mean square error.
Timothy J. Payne
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Assignments and abstract moment maps [PDF]
Journal of Differential Geometry, 1999 moment maps arise as a generalization of genuine moment maps on symplectic manifolds when the symplectic structure is discarded, but the relation between the mapping and the action is kept. Particular examples of abstract moment maps had been used in Hamiltonian mechanics for some time, but the abstract notion originated in the study of cobordisms of ...
Ginzburg, Viktor L. +2 more
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