Dmitriy Leykekhman, Michael Pruitt. On the positivity of discrete harmonic functions and the discrete Harnack inequality for piecewise linear finite elements. Math. Comput., 86(305):1127-1145, 2017. [doi]
@article{LeykekhmanP17,
title = {On the positivity of discrete harmonic functions and the discrete Harnack inequality for piecewise linear finite elements},
author = {Dmitriy Leykekhman and Michael Pruitt},
year = {2017},
doi = {10.1090/mcom/3117},
url = {http://dx.doi.org/10.1090/mcom/3117},
researchr = {https://researchr.org/publication/LeykekhmanP17},
cites = {0},
citedby = {0},
journal = {Math. Comput.},
volume = {86},
number = {305},
pages = {1127-1145},
}