Results 11 to 20 of about 511,872 (337)

Semisimple Hopf Algebras via Geometric Invariant Theory [PDF]

open access: yesAdvances in Mathematics, 2015
We study Hopf algebras via tools from geometric invariant theory. We show that all the invariants we get can be constructed using the integrals of the Hopf algebra and its dual together with the multiplication and the comultiplication, and that these ...
E. Meir
semanticscholar   +5 more sources

Geometric invariant theory and flips [PDF]

open access: yesJournal of the American Mathematical Society, 1994
We study the dependence of geometric invariant theory quotients on the choice of a linearization. We show that, in good cases, two such quotients are related by a flip in the sense of Mori, and explain the relationship with the minimal model programme ...
M. Thaddeus
semanticscholar   +4 more sources

Variation of geometric invariant theory quotients [PDF]

open access: yesPublications mathématiques de l'IHÉS, 1994
Geometric Invariant Theory gives a method for constructing quotients for group actions on algebraic varieties which in many cases appear as moduli spaces parameterizing isomorphism classes of geometric objects (vector bundles, polarized varieties, etc.).
I. Dolgachev, Y. Hu
semanticscholar   +4 more sources

Instantons and geometric invariant theory [PDF]

open access: yesCommunications in Mathematical Physics, 1984
By the theorem of Atiyah-Ward (anti-)self-dual Yang-Mills potentials on \(S^ 4\) correspond to certain holomorphic vector bundles on \({\mathbb{P}}_ 3({\mathbb{C}})\) via the twistor fibering \({\mathbb{P}}_ 3({\mathbb{C}})\to S^ 4\). In this paper a new correspondence is established by considering instead holomorphic vector bundles on \({\mathbb{P}}_ ...
S. Donaldson
semanticscholar   +3 more sources

Moment maps and geometric invariant theory [PDF]

open access: yesLes cours du CIRM, 2009
These lectures centered around the Kempf-Ness theorem, which describes the equivalence between notions of quotient in symplectic and algebraic geometry.
C. Woodward
semanticscholar   +6 more sources

Equivariant Dirac operators and differentiable geometric invariant theory [PDF]

open access: diamond, 2014
In this paper, we give a geometric expression for the multiplicities of the equivariant index of a spin-c Dirac operator.
P. Paradan, M. Vergne
semanticscholar   +3 more sources

Relative Geometric Invariant Theory and Universal Moduli Spaces [PDF]

open access: yesInternational Journal of Mathematics, 1995
We expose in detail the principle that the relative geometric invariant theory of equivariant morphisms is related to the GIT for linearizations near the boundary of the G-effective ample cone.
Y. Hu
semanticscholar   +4 more sources

Geometric invariant theory and projective toric varieties [PDF]

open access: yes, 2005
This is an expository paper in which we define projective GIT quotients and introduce toric varieties from this perspective. It is intended primarily for readers who are learning either invariant theory or toric geometry for the first time.Comment: 9 ...
Proudfoot, Nicholas J.
core   +4 more sources

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