Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A 2.542-Approximation for Precedence Constrained Single Machine
  Scheduling with Release Dates and Total Weighted Completion Time Objective   We present a $\sqrt{e}/(\sqrt{e}-1)$-approximation algorithm for the
nonpreemptive scheduling problem to minimize the total weighted completion time
of jobs on a single machine subject to release dates and precedence
constraints. The previously best known approximation algorithm dates back to
1997; its performance guarantee can be made arbitrarily close to the Euler
constant $e$.

12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int