Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simplified Parsing Expression Derivatives   This paper presents a new derivative parsing algorithm for parsing expression
grammars; this new algorithm is both simpler and faster than the existing
parsing expression derivative algorithm presented by Moss. This new algorithm
improves on the worst-case space and runtime bounds of the previous algorithm
by a linear factor, as well as decreasing runtime by about half in practice. A
proof of correctness for the new algorithm is included in this paper, a result
not present in earlier work.

9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
10
The categories of this paper are: q-bio