Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equivariant vector bundles on Drinfeld's halfspace over a finite field   Let $\mathcal{X} \subset \mathbb{P}_k^d$ be Drinfeld's halfspace over a
finite field $k$ and let $\mathcal{E}$ be a homogeneous vector bundle on
$\mathbb{P}_k^d$. The paper deals with two different descriptions of the space
of global sections $H^0(\mathcal{X},\mathcal{E})$ as
$GL_{d+1}(k)$-representation. This is an infinite dimensional modular
representation. Here we follow the ideas of \cite{O2,OS} treating the $p$-adic
case. As a replacement for the universal enveloping algebra we consider both
the crystalline universal enveloping algebra and the ring of differential
operators on the flag variety with respect to $\mathcal{E}.$

28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs