Feynman integrals are easily solved if their system of differential equations is in ε-form. In this letter we show by the explicit example of the kite integral family that an ε-form can even be achieved, if the Feynman integrals do not evaluate to multiple polylogarithms. The ε-form is obtained by a (non-algebraic) change of basis for the master integrals.
@article{arxiv.1802.05020,
title = {The $\varepsilon$-form of the differential equations for Feynman integrals in the elliptic case},
author = {Luise Adams and Stefan Weinzierl},
journal= {arXiv preprint arXiv:1802.05020},
year = {2018}
}