Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Memories of Julian Schwinger   The career and accomplishments of Julian Schwinger, who shared the Nobel
Prize for physics in 1965, have been reviewed in numerous books and articles.
For this reason these Memories, which seek to convey a sense of Schwinger's
remarkable talents as a physicist, concentrate primariy (though not entirely)
on heretofore unpublished pertinent recollections of the youthful Schwinger by
this writer, who first encountered Schwinger in 1934 when they both were
undergraduates at the City College of New York.

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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: acc-phys