Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On modelling bicycle power-meter measurements: Part II. Relations
  between rates of change of model quantities   Power-meter measurements are used to study a model that accounts for the use
of power by a cyclist. The focus is on relations between rates of change of
model quantities, such as power and speed, both in the context of partial
derivatives, where other quantities are constant, and Lagrange multipliers,
where other quantities vary to maintain the imposed constraints.

34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess