Hong Kong University of Science and Technology

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20022011

most citedSuperconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs

753 citations

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6 papers · 1 filter

math.RT2010★ 1 cited

On frobenius splitting of orbit closures of spherical subgroups in flag varieties

Xuhua He, Jesper Funch Thomsen

Let $H$ be a connected spherical subgroup of a semisimple algebraic group $G$ . In this paper, we give a criterion for $H$ -orbit closures in the flag variety of $G$ to have nice geo…

math.RT2010★ 5 cited

Closure of Steinberg fibers and affine Deligne-Lusztig varieties

Xuhua He

We discuss some connections between the closure $F ˉ$ of a Steinberg fiber in the wonderful compactification of an adjoint group and the affine Deligne-Lusztig varieties $X_w(1)…

math.RT2009

On intersections of certain partitions of a group compactification

Xuhua He, Jiang-Hua Lu

Let $G$ be a connected semi-simple algebraic group of adjoint type over an algebraically closed field, and let $G$ be the wonderful compactification of $G$ . For a fixed…

math.RT2009★ 1 cited

Character sheaves on the semi-stable locus of a group compactification

Xuhua He

We study the intermediate extension of the character sheaves on an adjoint group to the semi-stable locus of its wonderful compactification. We show that the intermediate extension…

math.RT2008

Ad-nilpotent Ideals of Minimal Dimension

Chuying Fang

n this paper we study ad-nilpotent ideals of a complex simple Lie algebra $\ccg$ and their connections with affine Weyl groups and nilpotent orbits. We define a left equivalence re…

math.RT2005★ 1 cited

Dirac operators and Lie algebra cohomology

Jing-Song Huang, Pavle Pandžić, David Renard

Dirac cohomology is a new tool to study unitary and admissible representations of semisimple Lie groups. It was introduced by Vogan and further studied by Kostant and ourselves \ci…