Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transformations of Grassmannians and automorphisms of linear groups   We consider transformations preserving certain linear structure in
Grassmannians and give some generalization of the Fundamental Theorem of
Projective Geometry and the Chow Theorem [Ch]. It will be exploited to study
linear $(k,n-k)$-involutions, $1<k<n-1$. The analogy of the well-known J.
Dieudonn\'{e} and C. E. Rickart result will be obtained.

20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph