Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On flips of unitary buildings I: Classification of flips   We classify flips of buildings arising from non-degenerate unitary spaces of
dimension at least 4 over finite fields of odd characteristic in terms of their
action on the underlying vector space. We also construct certain geometries
related to flips and prove that these geometries are flag transitive.

26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph