Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Minimality of a Kind of Pseudo-Umbilical Totally Real Submanifolds in
  Non-Flat Complex Space Forms   In this paper, by studying the position of umbilical normal vectors in the
normal bundle, we prove that pseudo-umbilical totally real submanifolds with
flat normal connection in non-flat complex space forms must be minimal.

18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th