Perturbative calculation of multi-loop Feynman diagrams. New type of expansions for critical exponents

@article{Kleinert1999PerturbativeCO,
  title={Perturbative calculation of multi-loop Feynman diagrams. New type of expansions for critical exponents},
  author={H. Kleinert},
  journal={Physics Letters B},
  year={1999},
  volume={465},
  pages={235-240}
}
Abstract We show that the calculation of L -loop Feynman integrals in D dimensions can be reduced to a series of matrix multiplications in L dimensions. This leads to a new type of expansions for the critical exponents in three dimensions in which all coefficients are calculable exactly. 
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Efficient algorithm for perturbative calculation of multi-loop Feynman integrals
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