Harald Hofstätter, Othmar Koch. Non-satisfiability of a positivity condition for commutator-free exponential integrators of order higher than four. Numerische Mathematik, 141(3):681-691, 2019. [doi]
@article{HofstatterK19,
title = {Non-satisfiability of a positivity condition for commutator-free exponential integrators of order higher than four},
author = {Harald Hofstätter and Othmar Koch},
year = {2019},
doi = {10.1007/s00211-018-1015-x},
url = {https://doi.org/10.1007/s00211-018-1015-x},
researchr = {https://researchr.org/publication/HofstatterK19},
cites = {0},
citedby = {0},
journal = {Numerische Mathematik},
volume = {141},
number = {3},
pages = {681-691},
}