Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Epimorphisms of pseudo-quadratic polar spaces   We classify the epimorphisms of the buildings ${BC}_l(K,K_0,\sigma,L, q_0)$,
where l is at least two, of pseudo-quadratic form type. This completes the
classification of epimorphisms of irreducible spherical Moufang buildings of
rank at least two.

21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: supr-con
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th