Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homotopies of Lie Crossed Module Morphisms   In this paper we will define notion homotopy of morphisms of crossed modules
of Lie algebras. Then we construct a groupoid structure of Lie crossed module
morphisms and their homotopies.

23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph