Notes on instantons in topological field theory and beyond

@article{Frenkel2007NotesOI,
  title={Notes on instantons in topological field theory and beyond},
  author={Edward Vladimir Frenkel and Andrey S. Losev and Nikita A. Nekrasov},
  journal={arXiv: High Energy Physics - Theory},
  year={2007},
  volume={171},
  pages={215-230}
}
Instantons beyond topological theory. I
Abstract Many quantum field theories in one, two and four dimensions possess remarkable limits in which the instantons are present, the anti-instantons are absent, and the perturbative corrections
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