Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A counterexample to $C^{2,1}$ regularity for parabolic fully nonlinear
  equations   We address the self-similar solvability of a singular parabolic problem and
show that solutions to parabolic fully nonlinear equations are not expected to
be $C^{2,1}$.

30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph