Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Geometric Approach to Differential Forms   This is a draft of a textbook on differential forms. The primary target
audience is sophmore level undergraduates enrolled in what would traditionally
be a course in vector calculus. Later chapters will be of interest to advaced
undergraduate and beginning graduate students. Applications include brief
introductions to Maxwell's equations, foliations and contact structures, and
DeRham cohomology.

0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin