Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Factorizing one-loop contributions to two-loop Bhabha scattering and
  automatization of Feynman diagram calculations   In higher order calculations a number of new technical problems arise: one
needs diagrams in arbitrary dimension in order to obtain their needed
$\epsilon$-expansion, zero Gram determinants appear, renormalization produces
diagrams with `dots' on the lines, i.e. higher order powers of scalar
propagators. All these problems cannot be accessed by the `standard'
Passarino-Veltman approach: there is not available what is needed for higher
loops. We demonstrate our method of how to solve these problems.

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The categories of this paper are: alg-geom
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph