Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rigidity of convex divisible domains in flag manifolds   In contrast to the many examples of convex divisible domains in real
projective space, we prove that up to projective isomorphism there is only one
convex divisible domain in the Grassmannian of $p$-planes in $\mathbb{R}^{2p}$
when $p > 1$. Moreover, this convex divisible domain is a model of the
symmetric space associated to the simple Lie group SO$(p, p)$.

32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: q-alg
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
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The categories of this paper are: chem-ph