Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A cubic generalization of Brahmagupta's identity   We give an algebraic identity for cubic polynomials which generalizes
Brahmagupta's identity and facilitates arithmetic in cubic fields. We also pose
a question about a relationship between the elements of a cubic field of fixed
trace and fixed norm and rational points of an elliptic curve.

30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con