Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Riesz type inequalities for harmonic mappings on the unit disk   We prove some sharp inequalities for complex harmonic functions on the unit
disk. The results extend a M. Riesz conjugate function theorem and some
well-known estimates for holomorphic functions. We apply some of results to the
isoperimetric inequality for harmonic mappings.

21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga