Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: General Doppler Shift Equation and the Possibility of Systematic Error
  in Calculation of Z for High Redshift Type Ia Supernovae   Systematic error in calculation of z for high redshift type Ia supernovae
could help explain unexpected luminosity values that indicate an accelerating
rate of expansion of the universe.

25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph