Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Updating the Historical Sunspot Record   We review the evidence for the argument that Rudolf Wolf's calibration of the
Sunspot Number is likely to be correct and that Max Waldmeier introduced an
upwards jump in the sunspot number in 1945. The combined effect of these
adjustments suggests that there has been no secular change in the sunspot
number since coming out of the Maunder Minimum ~1700.

28
The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th