Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coefficient estimates, Landau's theorem and Lipschitz-type spaces on
  planar harmonic mappings   In this paper, we investigate the properties of locally univalent and
multivalent planar harmonic mappings. First, we discuss the coefficient
estimates and Landau's Theorem for some classes of locally univalent harmonic
mappings, and then we study some Lipschitz-type spaces for locally univalent
and multivalent harmonic mappings.

26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: eess
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph