Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Type of Superstring in four dimension   A bosonic string in twenty six dimensions is effectively reduced to four
dimensions by eleven Majorana fermions which are vectors in the bosonic
represetation SO(d-1,1). By dividing the fermions in two groups, actions can be
written down which are world sheet supersymmetric, 2-d local and local 4-d
supersymmetric. The novel string is anomally free, free of ghosts and the
partition function is modular invariant.

10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg