Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on Alxesandrov type theorem for k-convex functions   In this note we show that $k$-convex functions on $\Bbb R^n$ are twice
differentiable almost everywhere for every positive integer $k>n/2$. This
generalizes the classical Alexsandrov's theorem for convex functions.

14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an