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Displaying 1421 – 1440 of 1712

The cohomology ring of polygon spaces

Jean-Claude Hausmann, Allen Knutson (1998)

Annales de l'institut Fourier

We compute the integer cohomology rings of the “polygon spaces”introduced in [F. Kirwan, Cohomology rings of moduli spaces of vector bundles over Riemann surfaces, J. Amer. Math. Soc., 5 (1992), 853-906] and [M. Kapovich & J. Millson, the symplectic geometry of polygons in Euclidean space, J. of Diff. Geometry, 44 (1996), 479-513]. This is done by embedding them in certain toric varieties; the restriction map on cohomology is surjective and we calculate its kernel using ideas from the theory...

The cohomology ring of the Hilbert scheme of 3 points on a smooth projective variety.

Lothar Göttsche, Barbara Fantechi (1993)

Journal für die reine und angewandte Mathematik

The cohomology rings of moduli stacks of principal bundles over curves.

Heinloth, Jochen, Schmitt, Alexander H.W. (2010)

Documenta Mathematica

The cokernel of the operator $\partial / \partial x_{n}$ acting on a $𝒟_{n}$ -module, II

Arno Van den Essen (1985)

Compositio Mathematica

The coniveau filtration and non-divisibility for algebraic cycles.

Hélène Esnault, Spencer Bloch (1996)

Mathematische Annalen

The connectedness of degeneracy loci

Loring W. Tu (1990)

Banach Center Publications

The connectedness of symmetric degeneracy loci: odd ranks. Appendix to "The connectedness of degeneracy loci" by L. W. Tu

Joe Harris, Loring W. Tu (1990)

Banach Center Publications

The correspondence between Barsotti-Tate groups and Kisin modules when $p = 2$

Tong Liu (2013)

Journal de Théorie des Nombres de Bordeaux

Let $K$ be a finite extension over $ℚ_{2}$ and $𝒪_{K}$ the ring of integers. We prove the equivalence of categories between the category of Kisin modules of height 1 and the category of Barsotti-Tate groups over $𝒪_{K}$ .

The covariant systems of Todd and Segre

David B. Scott (1968/1969)

Séminaire Dubreil. Algèbre et théorie des nombres

The covering semigroup of invariant control systems on Lie groups

Víctor Ayala, Eyüp Kizil (2016)

Kybernetika

It is well known that the class of invariant control systems is really relevant both from theoretical and practical point of view. This work was an attempt to connect an invariant systems on a Lie group $G$ with its covering space. Furthermore, to obtain algebraic properties of this set. Let $G$ be a Lie group with identity $e$ and $Σ \subset 𝔤$ a cone in the Lie algebra $𝔤$ of $G$ that satisfies the Lie algebra rank condition. We use a formalism developed by Sussmann, to obtain an algebraic structure on the covering...