Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Kai Behrend"'
Autor:
Kai Behrend, Ezra Getzler
Publikováno v:
Progress in Mathematics ISBN: 9783319496368
In an enriched setting, we show that higher groupoids and higher categories form categories of fibrant objects, and that the nerve of a differential graded algebra is a higher category in the category of algebraic varieties.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69a263058e53ede0e397fd85b0a87135
https://doi.org/10.1007/978-3-319-49638-2_1
https://doi.org/10.1007/978-3-319-49638-2_1
Autor:
Kai Behrend, Pooya Ronagh
We study the action of the inertia operator on the motivic Hall algebra, and prove that it is diagonalizable. This leads to a filtration of the Hall algebra, whose associated graded algebra is commutative. In particular, the degree 1 subspace forms a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b0303257347d909b039f61764325e68
http://arxiv.org/abs/1612.00372
http://arxiv.org/abs/1612.00372
Autor:
Kai Behrend
Publikováno v:
Annals of Mathematics. 170:1307-1338
We prove that Donaldson-Thomas type invariants are equal to weighted Euler characteristics of their moduli spaces. In particular, such invariants depend only on the scheme structure of the moduli space, not the symmetric obstruction theory used to de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6f64eb926c356c0a42b244dd50dc305
https://doi.org/10.4007/annals.2009.170.1307
https://doi.org/10.4007/annals.2009.170.1307
Autor:
Kai Behrend, Ajneet Dhillon
Publikováno v:
Canadian Journal of Mathematics. 61:3-28
Let $X$ be a smooth projective geometrically connected curve over a finite field with function field $K$. Let $\G$ be a connected semisimple group scheme over $X$. Under certain hypothesis we prove the equality of two numbers associated with $\G$. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2dea50f6ecc055a9fcda982fe4afe37
https://doi.org/10.4153/cjm-2009-001-5
https://doi.org/10.4153/cjm-2009-001-5
Autor:
Juergen Braun, Kirsten Karberg, Thomas Mairinger, Oliver Kaschke, Kai Behrendt, Josef Ramsbacher
Publikováno v:
RMD Open, Vol 9, Iss 2 (2023)
A 68-year-old woman presented with bilateral swelling of the salivary glands, sicca symptoms of eyes and mouth, itching, fatigue and weight gain of about 5 kg in the last 2–3 years. As part of a careful diagnostic work up including lab tests for an
Externí odkaz:
https://doaj.org/article/626cb217d7304534973379eb8d304912
Publikováno v:
Comptes Rendus Mathematique. 344:247-252
We prove that the homology groups of the free loop stack of an oriented stack are equipped with a canonical loop product and coproduct, which makes it into a Frobenius algebra. Moreover, the shifted homology H • ( L X ) = H • + d ( L X ) admits a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9a0cb11c9a1991e6e9739b6c4041123
https://doi.org/10.1016/j.crma.2006.10.006
https://doi.org/10.1016/j.crma.2006.10.006
Autor:
Kai Behrend, Jim Bryan
Publikováno v:
Mathematical Research Letters. 14:559-571
We solve the part of the Donaldson-Thomas theory of Calabi-Yau threefolds which comes from super-rigid rational curves. As an application, we prove a version of the conjectural Gromov-Witten/Donaldson-Thomas correspondence of \cite{MNOP} for contribu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::573875cc4cb1de2be7a621b2d10d33d1
https://doi.org/10.4310/mrl.2007.v14.n4.a2
https://doi.org/10.4310/mrl.2007.v14.n4.a2
Autor:
Behrang Noohi, Kai Behrend
We construct, using geometric invariant theory, a quasi-projective Deligne–Mumford stack of stable graded algebras. We also construct a derived enhancement, which classifies twisted bundles of stable graded $$A_\infty $$ -algebras. The tangent comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3cca28d7fc9255464a3017e35b0e9ea
http://arxiv.org/abs/1507.07054
http://arxiv.org/abs/1507.07054
Autor:
Anne O'Halloran, Kai Behrend
Publikováno v:
Inventiones mathematicae. 154:385-450
We describe an approach to calculating the cohomology rings of stable map spaces. The method we use is due to Akildiz-Carrell and employs a C^*-action and a vector field which is equivariant with respect to this C^*-action. We give an explicit descri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62bbe31c03d2f0e1c00afb82d3c99458
https://doi.org/10.1007/s00222-003-0308-5
https://doi.org/10.1007/s00222-003-0308-5
Autor:
Ping Xu, Kai Behrend
Publikováno v:
Comptes Rendus Mathematique. 336:163-168
We study $S^1$-bundles and $S^1$-gerbes over differentiable stacks in terms of Lie groupoids, and construct Chern classes and Dixmier-Douady classes in terms of analogues of connections and curvature.
6 pages
6 pages
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a07fb358d6c8f52c7db1e2a38f498331
https://doi.org/10.1016/s1631-073x(02)00025-0
https://doi.org/10.1016/s1631-073x(02)00025-0