Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: James Clerk Maxwell on quantities and units   In the scientific literature the equation $Q=\{Q\}[Q]$ is frequently quoted,
where $Q$ denotes a quantity, $\{Q\}$ a numerical value, and $[Q]$ a unit.
During the last years some experts claimed, that this equation is due to James
Clerk Maxwell. This is obvious, they say, from the opening sentences at the
beginning of Maxwell's book "A Treatise on Electricity and Magnetism". In this
paper it will be shown that this view cannot be justified.

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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin