Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Multi-Vector Spaces   A Smarandache multi-space is a union of $n$ spaces $A_1,A_2,..., A_n$ with
some additional conditions holding. Combining Smarandache multi-spaces with
linear vector spaces in classical linear algebra, the conception of
multi-vector spaces is introduced. Some characteristics of a multi-vector space
are obtained in this paper.

13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph