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A global view is given upon the study of collapsing shear-free perfect fluid spheres with heat flow. We apply a compact formalism, which simplifies the isotropy condition and the condition for conformal flatness. This formalism also…

General Relativity and Quantum Cosmology · Physics 2012-06-08 B. V. Ivanov

We develop a stabilized cut finite element method for the convection problem on a surface based on continuous piecewise linear approximation and gradient jump stabilization terms. The discrete piecewise linear surface cuts through a…

Numerical Analysis · Mathematics 2015-11-10 Erik Burman , Peter Hansbo , Mats G. Larson , Sara Zahedi

We completely classify the possible extensions between semistable vector bundles on the Fargues-Fontaine curve (over an algebraically closed perfectoid field), in terms of a simple condition on Harder-Narasimhan polygons. Our arguments rely…

Number Theory · Mathematics 2023-06-22 Christopher Birkbeck , Tony Feng , David Hansen , Serin Hong , Qirui Li , Anthony Wang , Lynnelle Ye

We show that the category of ind-coherent sheaves on a quasi-smooth scheme is naturally tensored over the category of sheared D-modules on its shifted cotangent bundle, commuting with its natural action of categorified Hoschschild cochains.…

Algebraic Geometry · Mathematics 2024-10-22 Dario Beraldo , Kevin Lin , Wyatt Reeves

Let $X$ be a projective scheme over a field. We show that the vanishing cohomology of any sequence of coherent sheaves is closely related to vanishing under pullbacks by the Frobenius morphism. We also compare various definitions of ample…

Algebraic Geometry · Mathematics 2018-05-11 Dennis S. Keeler

We constructed a projective moduli space of semistable torsion free sheaves with `fixed determinant' on a reducible curve. When a family of smooth curves degenerates to the reducible curve, our moduli space is a degeneration of the moduli…

Algebraic Geometry · Mathematics 2007-05-23 Xiaotao Sun

We show that coinvariants of modules over vertex operator algebras give rise to quasi-coherent sheaves on moduli of stable pointed curves. These generalize Verlinde bundles or vector bundles of conformal blocks defined using affine Lie…

Algebraic Geometry · Mathematics 2021-09-22 Chiara Damiolini , Angela Gibney , Nicola Tarasca

We formulate a quantum formalism for the statistical mechanical models of discretized field theories on lattices and then show that the discrete version of $\phi^4$ theory on 2D square lattice is complete in the sense that the partition…

Quantum Physics · Physics 2013-05-30 Vahid Karimipour , Mohammad Hossein Zarei

It is proved, that if an almost Hermitian manifold satisfies the axiom of coholomorphic spheres, it is conformal flat.

Differential Geometry · Mathematics 2010-04-23 Ognian Kassabov

Let $X$ be an arbitrary scheme. The category $\mathfrak{Qcoh}(X)$ of quasi--coherent sheaves on $X$ is known that admits arbitrary direct products. However their structure seems to be rather mysterious. In the present paper we will describe…

Algebraic Geometry · Mathematics 2016-08-14 Sinem Odabaşı

We show that the cohomology table of any coherent sheaf on projective space is a convergent--but possibly infinite--sum of positive real multiples of the cohomology tables of what we call supernatural sheaves.

Algebraic Geometry · Mathematics 2009-02-11 David Eisenbud , Frank-Olaf Schreyer

Quasipatterns (two-dimensional patterns that are quasiperiodic in any spatial direction) remain one of the outstanding problems of pattern formation. As with problems involving quasiperiodicity, there is a small divisor problem. In this…

Pattern Formation and Solitons · Physics 2019-10-03 G. Iooss , A. M. Rucklidge

We prove a desingularization theorem for the quasi-smooth derived scheme, in the sense of Hekking. We also propose the conjecture that the K-theoretic integration of the virtual fundamental class of a quasi-smooth derived scheme could be…

Algebraic Geometry · Mathematics 2023-06-21 Yu Zhao

On a flat manifold, M. Kontsevich's formality quasi-isomorphism is compatible with cup-products on tangent cohomology spaces, in the sense that its derivative at any formal Poisson 2-tensor induces an isomorphism of graded commutative…

Quantum Algebra · Mathematics 2007-05-23 Dominique Manchon , Charles Torossian

This paper contains a Kawamata-Viehweg-Koll\'ar type vanishing theorem for vector bundles. In order to formulate and prove this cleanly, we introduce a class of sheaves that automatically satisfies a vanishing theorem. This is obtained by…

Algebraic Geometry · Mathematics 2007-05-23 Donu Arapura

We show that the set of singular holomorphic foliations of the projective spaces with split tangent sheaf and with good singular set is open in the space of holomorphic foliations. As applications we present a generalization of a result by…

Complex Variables · Mathematics 2010-04-05 Fernando Cukierman , Jorge Vitorio Pereira

Inhomogeneous flows and shear banding are of interest for a range of applications but have been eluding a comprehensive theoretical understanding, mostly due to the lack of a framework comparable to equilibrium statistical mechanics. Here…

Statistical Mechanics · Physics 2025-05-15 Thomas Speck

In the smooth case, we prove quasi-flasqueness for the sheaves of all subelliptic multipliers as well as at each of the steps of the Kohn algorithm on a pseudoconvex domain in $\C^n.$ We use techniques by Jean-Claude Tougeron to show that…

Algebraic Geometry · Mathematics 2014-08-13 Andreea C. Nicoara

We prove that a large class of natural transformations (consisting roughly of those constructed via composition from the "functorial" or "base change" transformations) between two functors of the form $\cdots f^* g_* \cdots$ actually has…

Algebraic Geometry · Mathematics 2014-04-17 Ryan Cohen Reich

Based on the thermodynamic variation, we rigorously derive the sharp-interface model for solid-state dewetting on a flat substrate in the form of cylindrical symmetry. The governing equations for the model belong to fourth-order geometric…

Materials Science · Physics 2018-05-22 Quan Zhao