Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hartree-Fock & Density Functional Theory   These are the lecture notes used in the course Understanding Quantum
Chemistry for 1st year master chemistry at the Vrije Universiteit Amsterdam.
The schedule is 2 weeks on HF and 2 weeks on DFT, which provides a quite rough
ride for the the students. The lecture notes also include exercises. I have
started to write them in 2013 and each year I try to find the time to improve
them.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin