Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on Ramsey numbers for Berge-G hyper graphs   For a graph G=(V,E), a hypergraph H is called Berge-G if there is a bijection
f from E(G) to E(H) such that for each e in E(G), e is a subset of f(e). The
set of all Berge-G hypergraphs is denoted B(G). For integers k>1, r>1, and a
graph G, let the Ramsey number R_r(B(G), k) be the smallest integer n such that
no matter how the edges of a complete r-uniform n-vertex hypergraph are colored
with k colors, there is a copy of a monochromatic Berge-G subhypergraph.
Furthermore, let R(B(G),k) be the smallest integer n such that no matter how
all subsets an n-element set are colored with k colors, there is a
monochromatic copy of a Berge-G hypergraph. We give an upper bound for
R_r(B(G),k) in terms of graph Ramsey numbers. In particular, we prove that when
G becomes acyclic after removing some vertex, R_r(B(G),k)\le 4k|V(G)|+r-2, in
contrast with classical multicolor Ramsey numbers. When G is a triangle or a
K_4, we find sharper bounds and some exact results and determine some `small'
Ramsey numbers: k/2 - o(k) < R_3(B(K_3)), k) < 3k/4+ o(k), For any odd integer
t\neq 3, R(B(K_3),2^t-1)=t+2, 2^{ck} < R_3(B(K_4),k) < e(1+o(1))(k-1)k!,
R_3(B(K_3),2)=R_3(B(K_3),3)=5, R_3(B(K_3),4)=6, R_3(B(K_3),5)=7,
R_3(B(K_3),6)=8, R_3(B(K_3,8)=9, R_3(B(K_4),2)=6.

11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat