Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boost Invariant Surfaces with Pointwise 1-Type Gauss Map in Minkowski
  4-Space E4-1   In this paper, we study spacelike rotational surfaces which are called boost
invariant surfaces in Minkowski 4-space E41. We give necessary and sufficient
condition for flat spacelike rotational surface to have pointwise 1-type Gauss
map. Also, we obtain a characterization for boost invariant marginally trapped
surface with pointwise 1-type Gauss map.

4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph