Results 31 to 40 of about 3,784,223 (275)
The Kodaira Problem for Kähler Spaces with Vanishing First Chern Class
Forum of Mathematics, Sigma, 2021 Let X be a normal compact Kähler space with klt singularities and torsion canonical bundle. We show that X admits arbitrarily small deformations that are projective varieties if its locally trivial deformation space is smooth.
Patrick Graf, Martin Schwald
doaj +1 more source
The Chern-Ricci flow on complex surfaces [PDF]
, 2012 The Chern-Ricci flow is an evolution equation of Hermitian metrics by their Chern-Ricci form, first introduced by Gill. Building on our previous work, we investigate this flow on complex surfaces. We establish new estimates in the case of finite time non-
Ben Weinkove +15 more
core +1 more source
Radiatively Induced Lorentz and CPT Violation in Electrodynamics [PDF]
, 1999 In a nonperturbative formulation, radiative corrections arising from Lorentz and CPT violation in the fermion sector induce a definite and nonzero Chern-Simons addition to the electromagnetic action.
A. A. Andrianov +18 more
core +2 more sources
Almost complex 4-manifolds with vanishing first Chern class [PDF]
, 2006 An odd Seiberg-Witten invariant imposes bounds on the signature of a closed, almost complex 4-manifold with vanishing first Chern class. This applies in particular to symplectic 4-manifolds of Kodaira dimension zero.
S. Bauer
semanticscholar +1 more source
Regularization of closed positive currents and intersection theory
Complex Manifolds, 2017 We prove the existence of a closed regularization of the integration current associated to an effective analytic cycle, with a bounded negative part.
Méo Michel
doaj +1 more source
Non-invertible symmetries of class S theories
Journal of High Energy Physics, 2023 We study the non-invertible symmetries of class S $$ \mathcal{S} $$ theories obtained by compactifying the type a p − 1 $$ {\mathfrak{a}}_{p-1} $$ 6d (2,0) theory on a genus g Riemann surface with no punctures.
Vladimir Bashmakov +3 more
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OBSTRUCTIONS TO ALGEBRAIZING TOPOLOGICAL VECTOR BUNDLES
Forum of Mathematics, Sigma, 2019 Suppose $X$ is a smooth complex algebraic variety. A necessary condition for a complex topological vector bundle on $X$ (viewed as a complex manifold) to be algebraic is that all Chern classes must be algebraic cohomology classes, that is, lie in the ...
A. ASOK, J. FASEL, M. J. HOPKINS
doaj +1 more source
Quillen's relative Chern character is multiplicative [PDF]
, 2007 In the 80's, Quillen constructed a de Rham relative cohomology class associated to a smooth morphism between vector bundles, that we call the relative Quillen Chern character.
Paradan, Paul-Emile, Vergne, Michèle
core +9 more sources
Algebraic construction of Witten's top Chern class [PDF]
, 2000 We give a construction of Witten's "top Chern class" on the compactified moduli space of curves with higher spin structures and show that it satisfies most of the axioms proposed in math.AG/9905034.
A. Polishchuk, A. Vaintrob
semanticscholar +1 more source