@article{neighborhoodfiltersandthedecreasing,
  title = {Neighborhood filters and the decreasing rearrangement},
  author = {Gonzalo Galiano and Julián Velasco},
  year = {2013},
  eprint = {1311.2191},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1311.2191v2},
}