Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A simplified multidimensional integral   We present a simplified integral of functions of several variables. Although
less general than the Riemann integral, most functions of practical interest
are still integrable. On the other hand, the basic integral theorems can be
obtained more quickly. We also give a characterization of the integrable
functions and their primitives.

22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs