We enumerate possible topologies of pseudoknots in single-stranded RNA molecules. We use a steepest-descent approximation in the large N matrix field theory, and a Feynman diagram formalism to describe the resulting pseudoknot structure.
Cite
@article{arxiv.physics/0207110,
title = {A steepest descent calculation of RNA pseudoknots},
author = {M. Pillsbury and H. Orland and A. Zee},
journal= {arXiv preprint arXiv:physics/0207110},
year = {2013}
}