@article {
author = {Lucas, P. and Ramírez-Ospina, H.F.},
title = {Hyperbolic surfaces of $L_1$-2-type},
journal = {Bulletin of the Iranian Mathematical Society},
volume = {43},
number = {6},
pages = {1769-1779},
year = {2017},
publisher = {Iranian Mathematical Society (IMS)},
issn = {1017-060X},
eissn = {1735-8515},
doi = {},
abstract = {In this paper, we show that an $L_1$-2-type surface in the three-dimensional hyperbolic space $H^3\subset R^4_1$ either is an open piece of a standard Riemannian product $ H^1(-\sqrt{1+r^2})\times S^{1}(r)$, or it has non constant mean curvature, non constant Gaussian curvature, and non constant principal curvatures.},
keywords = {Hyperbolic surface,Cheng-Yau operator,$L_1$-finite-type surface,$L_1$-biharmonic surface,Newton transformation},
url = {http://bims.iranjournals.ir/article_1062.html},
eprint = {http://bims.iranjournals.ir/article_1062_5af9f5b2ebe4719b4560a0e48f304949.pdf}
}