Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: In Memory of Julian Schwinger   Although he was the recipient of a Nobel Prize and despite the greatness of
his accomplishments, Julian Schwinger is almost an unsung hero of our age . He
is relatively unknown to the general population, even though in the physics
community he was a renowned theoretician and teacher of physics. He shared the
1965 Nobel Prize in physics with Richard P. Feynman and Shin'ichiro Tomonaga
for their development of Quantum Electrodynamics (QED). Of these three
extraordinary physicists, and even of all the physicists that worked on QED,
his work was the most rigorous and mathematically exacting.

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The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph