Vector fields on $\mathfrak{osp}_{2m-1|2n}(\mathbb C)$-flag supermanifolds

Rigidity of flag supermanifolds

We prove that under certain assumptions a supermanifold of flags is rigid, this is its complex structure does not admit any non-trivial small deformation. Moreover under the same assumptions we show that a supermanifold of flags is unique non-split supermanifold with given retract.

Vector fields on $\mathfrak{osp}_{2m|2n}(\mathbb C)$- and $π\mathfrak{sp}_{n}(\mathbb C)$-flag supermanifolds

The paper is devoted to a computation of the Lie superalgebras of holomorphic vector fields on isotropic flag supermanifolds of maximal type corresponding to the Lie superalgebras $\mathfrak{osp}_{2m|2n}(\mathbb C)$ and $π\mathfrak{sp}_{n}(\mathbb C)$. The result is that under some restrictions on the flag type any holomorphic vector field is fundamental with respect to the natural action of the Lie superalgebras $\mathfrak{osp}_{2m|2n}(\mathbb C)$ or $π\mathfrak{sp}_{n}(\mathbb C)$.

Vector fields on $\mathfrak{gl}_{m|n}(\mathbb C)$-flag supermanifolds

The main result of this paper is the computation of the Lie superalgebras of holomorphic vector fields on complex flag supermanifolds, introduced by Yu.I.Manin. We prove that with several exceptions any holomorphic vector field is fundamental with respect to the natural action of the Lie superalgebra $\mathfrak {gl}_{m|n}(\mathbb C)$.

Measurability of open orbits in flag supermanifolds

Let $G_\mathbb{R}$ be a Lie group and $G$ its complexification. An open $G_\mathbb{R}$-orbit in a $G$-flag manifold is measurable whenever it carries a $G_\mathbb{R}$-invariant volume element. In this paper the notion of measurability is generalized to the supersymmetric setting and a classification of measurable open orbits in flag supermanifolds is given.

Vector fields on $Π$-symmetric flag supermanifolds

The main result of this paper is the computation of the Lie superalgebras of holomorphic vector fields on the complex $Π$-symmetric flag supermanifolds, introduced by Yu.I.~Manin. We prove that with one exception any vector field is fundamental with respect to the natural action of the Lie superalgebra $\mathfrak q_n(\mathbb C)$.

基本李超代数的旗超流形的平坦退化

Flat degenerations of flag supermanifolds for basic Lie superalgebras

本文将经典旗簇退化方法推广至超设定，通过调整表示基与滤波技术，构造了基本李超代数旗超流形的平坦退化，并探讨了退化至环面超簇的条件。