Helix surfaces in the special linear group

@article{Montaldo2013HelixSI,
  title={Helix surfaces in the special linear group},
  author={S. Montaldo and I. Onnis and A. Passos Passamani},
  journal={Annali di Matematica Pura ed Applicata (1923 -)},
  year={2013},
  volume={195},
  pages={59-77}
}
We characterize helix surfaces (constant angle surfaces) in the special linear group $$\mathrm {SL}(2,{\mathbb {R}})$$SL(2,R). In particular, we give an explicit local description of these surfaces by means of a suitable curve and a 1-parameter family of isometries of $$\mathrm {SL}(2,{\mathbb {R}})$$SL(2,R). 
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