Výsledky vyhledávání - "Severin Barmeier"

Akademický článek

Publikováno v: Physics Letters B, Vol 820, Iss , Pp 136594- (2021)

The canonical forms associated to scattering amplitudes of planar Feynman diagrams are interpreted in terms of masses of projectives, defined as the modulus of their central charges, in the hearts of certain t-structures of derived categories of quiv

Externí odkaz: https://doaj.org/article/a02bfa6cd8be44e880b43e436e926b59

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Strict Quantization of Polynomial Poisson Structures

Autor: Severin Barmeier, Philipp Schmitt

Publikováno v: Communications in mathematical physics 398 (2023), Nr. 3
Communications in mathematical physics

We show how combinatorial star products can be used to obtain strict deformation quantizations of polynomial Poisson structures on $\mathbb R^d$, generalizing known results for constant and linear Poisson structures to polynomial Poisson structures o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dac71359fca44f01daa1c39b104d25f
https://doi.org/10.1007/s00220-022-04541-4

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Classical deformations of noncompact surfaces and their moduli of instantons

Autor: Elizabeth Gasparim, Severin Barmeier

Publikováno v: Journal of Pure and Applied Algebra. 223:2543-2561

We describe semiuniversal deformation spaces for the noncompact surfaces $Z_k := \operatorname{Tot} (\mathcal O_{\mathbb P^1} (-k))$ and prove that any nontrivial deformation $Z_k (\tau)$ of $Z_k$ is affine. It is known that the moduli spaces of inst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d66362814c1412ce3f691dc8b1ed0e70
https://doi.org/10.1016/j.jpaa.2018.09.006

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Learning scattering amplitudes by heart

Autor: Koushik Ray, Severin Barmeier

Publikováno v: Physics Letters B, Vol 820, Iss, Pp 136594-(2021)
Physics Letters

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a523ae8af34c2b44b88f1f027bd80c5
https://doi.org/10.1016/j.physletb.2021.136594

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Deformation-obstruction theory for diagrams of algebras and applications to geometry

Autor: Severin Barmeier, Yael Fregier

Publikováno v: Journal of Noncommutative Geometry
Journal of Noncommutative Geometry, European Mathematical Society, 2020, 14 (3), pp.1019-1047. ⟨10.4171/JNCG/385⟩

Let $X$ be a smooth complex algebraic variety and let $\operatorname{Coh} (X)$ denote its Abelian category of coherent sheaves. By the work of W. Lowen and M. Van den Bergh, it is known that the deformation theory of $\operatorname{Coh} (X)$ as an Ab

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7afb6fbf55a6240d4d4863e333f25939
http://arxiv.org/abs/1806.05142

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A Lie theoretical construction of a Landau-Ginzburg model without projective mirrors

Autor: Elizabeth Gasparim, L. A. B. San Martin, Severin Barmeier, Lino Grama, Edoardo Ballico

We describe the Fukaya-Seidel category of a Landau-Ginzburg model LG(2) for the semisimple adjoint orbit of sl(2,C). We prove that this category is equivalent to a full triangulated subcategory of the category of coherent sheaves on the second Hirzeb

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Deformations of the discrete Heisenberg group

Autor: Severin Barmeier

Publikováno v: Proc. Japan Acad. Ser. A Math. Sci. 89, no. 4 (2013), 55-59

We study deformations of the discrete Heisenberg group acting properly discontinuously on the Heisenberg group from the left and right and obtain a complete description of the deformation space.
8 pages

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad74bd6234e5b741f659eca2cfdd8da2
http://projecteuclid.org/euclid.pja/1364869072

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Isomorphisms of Moduli Spaces

Autor: Carlos Casorrán Amilburu, Brian Callander, Severin Barmeier, Elizabeth Gasparim

Publikováno v: Gasparim, Elizabeth, Second Latin Congress on Symmetries in Geometry and Physics. Sociedade Brasileira de Matemática (Brazilian Mathematical Society), Brazil

We give infinitely many new isomorphisms between moduli spaces of bundles on local surfaces and on local Calabi--Yau threefolds.
Comment: 9 pages

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de327bf2c1397d2f85fce9567e66e9d2

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