Search Results - "LeBrun, Claude"

The Einstein–Maxwell equations, Kähler metrics, and Hermitian geometry by LeBrun, Claude

“…Any constant-scalar-curvature Kähler (cscK) metric on a complex surface may be viewed as a solution of the Einstein–Maxwell equations, and this allows one…”
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The Einstein–Maxwell Equations and Conformally Kähler Geometry by LeBrun, Claude

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On Conformally Kähler, Einstein Manifolds by Chen, Xiuxiong, Lebrun, Claude, Weber, Brian

“…We prove that any compact complex surface with c 1 > 0 c_1>0 admits an Einstein metric which is conformally related to a Kähler metric. The key new ingredient…”
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A Multisite Campaign to Measure Solar-like Oscillations in Procyon. I. Observations, Data Reduction, and Slow Variations by Arentoft, Torben, Kjeldsen, Hans, Bedding, Timothy R, Bazot, Michaël, Christensen-Dalsgaard, Jørgen, Dall, Thomas H, Karoff, Christoffer, Carrier, Fabien, Eggenberger, Patrick, Sosnowska, Danuta, Wittenmyer, Robert A, Endl, Michael, Metcalfe, Travis S, Hekker, Saskia, Reffert, Sabine, Butler, R. Paul, Bruntt, Hans, Kiss, László L, O’Toole, Simon J, Kambe, Eiji, Ando, Hiroyasu, Izumiura, Hideyuki, Sato, Bun’ei, Hartmann, Michael, Hatzes, Artie, Bouchy, Francois, Mosser, Benoit, Appourchaux, Thierry, Barban, Caroline, Berthomieu, Gabrielle, Garcia, Rafael A, Michel, Eric, Provost, Janine, Turck-Chièze, Sylvaine, Martić, Milena, Lebrun, Jean-Claude, Schmitt, Jerome, Bertaux, Jean-Loup, Bonanno, Alfio, Benatti, Serena, Claudi, Riccardo U, Cosentino, Rosario, Leccia, Silvio, Frandsen, Søren, Brogaard, Karsten, Glowienka, Lars, Grundahl, Frank, Stempels, Eric

“…We have carried out a multisite campaign to measure oscillations in the F5 star Procyon A. We obtained high-precision velocity observations over more than…”
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Ricci curvature, minimal volumes, and Seiberg-Witten theory by LeBrun, Claude

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The Einstein–Maxwell Equations and Conformally Kähler Geometry by LeBrun, Claude

“…Page’s Einstein metric on CP 2 # CP ¯ 2 is conformally related to an extremal Kähler metric. Here we construct a family of conformally Kähler solutions of the…”
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Yamabe Invariants, Homogeneous Spaces, and Rational Complex Surfaces by LeBrun, Claude

“…The Yamabe invariant is a diffeomorphism invariant of smooth compact manifolds that arises from the normalized Einstein-Hilbert functional. This article…”
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Twistors, Self-Duality, and Spinc Structures by LeBrun, Claude

“…The fact that every compact oriented 4-manifold admits spinc structures was proved long ago by Hirzebruch and Hopf. However, the usual proof is neither direct…”
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Bach-Flat Kähler Surfaces by LeBrun, Claude

“…A Riemannian metric on a compact 4-manifold is said to be Bach-flat if it is a critical point for the L 2 -norm of the Weyl curvature. When the Riemannian…”
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Mass, Kähler manifolds, and symplectic geometry by LeBrun, Claude

“…In the author’s previous joint work with Hein (Commun Math Phys 347:183–221, 2016 ), a mass formula for asymptotically locally Euclidean Kähler manifolds was…”
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Einstein metrics, conformal curvature, and anti-holomorphic involutions by LeBrun, Claude

“…Building on previous results [ 17 , 35 ], we complete the classification of compact oriented Einstein 4-manifolds with det ( W + ) > 0 . There are, up to…”
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Einstein Metrics, Symplectic Minimality, and Pseudo-Holomorphic Curves by Lebrun, Claude

“…Let (M4, g, omega) be a compact, almost-Kahler-Einstein manifold of negative star-scalar curvature. Then (M, omega) is a minimal symplectic 4-manifold of…”
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Einstein metrics, harmonic forms, and symplectic four-manifolds by LeBrun, Claude

“…If M is the underlying smooth oriented four-manifold of a Del Pezzo surface, we consider the set of Riemannian metrics h on M such that W + ( ω , ω ) > 0 ,…”
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Gravitational Instantons, Weyl Curvature, and Conformally Kähler Geometry by Biquard, Olivier, Gauduchon, Paul, LeBrun, Claude

“…Abstract In a previous paper [7], the first two authors classified complete Ricci-flat ALF Riemannian 4-manifolds that are toric and Hermitian, but non-Kähler…”
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Counter-examples to the generalized positive action conjecture by LEBRUN, C

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Weyl Curvature, Del Pezzo Surfaces, and Almost-Kähler Geometry by LeBrun, Claude

“…If a smooth compact 4 -manifold M admits a Kähler–Einstein metric g of positive scalar curvature, Gursky (Ann Math 148:315–337, 1998 ) showed that its…”
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Mass in Kähler Geometry by Hein, Hans-Joachim, LeBrun, Claude

“…We prove a simple, explicit formula for the mass of any asymptotically locally Euclidean (ALE) Kähler manifold, assuming only the sort of weak fall-off…”
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Twistors, Kahler Manifolds, and Bimeromorphic Geometry. I by Lebrun, Claude

“…By considering deformations of the Moishezon twistor spaces of CP2 #⋯ #CP2 constructed in [20], we show that the blow up of C2 at n points in general position…”
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Yamabe Invariants, Homogeneous Spaces, and Rational Complex Surfaces by LeBrun, Claude

“…SIGMA 19 (2023), 027, 11 pages The Yamabe invariant is a diffeomorphism invariant of smooth compact manifolds that arises from the normalized Einstein-Hilbert…”
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Curvature in the Balance: The Weyl Functional and Scalar Curvature of 4-Manifolds by LeBrun, Claude

“…The infimum of the Weyl functional is shown to be surprisingly small on many compact 4-manifolds that admit positive-scalar-curvature metrics. Results are also…”
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