Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On evolution algebras   The structural constants of an evolution algebra is given by a quadratic
matrix $A$. In this work we establish equivalence between nil, right nilpotent
evolution algebras and evolution algebras, which are defined by upper
triangular matrix $A$. The classification of 2-dimensional complex evolution
algebras is obtained. For an evolution algebra with a special form of the
matrix $A$ we describe all its isomorphisms and their compositions. We
construct an algorithm running under Mathematica which decides if two finite
dimensional evolution algebras are isomorphic.

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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: stat
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex