S Clémençon, J Jakubowicz, E Sibony - arXiv preprint arXiv:1403.1994, 2014 - arxiv.org
Incomplete rankings on a set of items $\{1,\;\ldots,\; n\} $ are orderings of the form $ a_
{1}\prec\dots\prec a_ {k} $, with $\{a_ {1},\dots a_ {k}\}\subset\{1,\dots, n\} $ and $ k< n …