Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Dirac Delta function based methods with applications to perturbative
  expansions in quantum field theory   We derive new all-purpose methods that involve the Dirac Delta distribution.
Some of the new methods use derivatives in the argument of the Dirac Delta. We
highlight potential avenues for applications to quantum field theory and we
also exhibit a connection to the problem of blurring/deblurring in signal
processing. We find that blurring, which can be thought of as a result of
multi-path evolution, is, in Euclidean quantum field theory without spontaneous
symmetry breaking, the strong coupling dual of the usual small coupling
expansion in terms of the sum over Feynman graphs.

29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol