%0 Journal Article
%T A theory of hierarchical consequence and conditionals
%A Dov Gabbay
%A Karl Schlechta
%J Mathematics
%D 2008
%I arXiv
%X We introduce A-ranked preferential structures and combine them with an accessibility relation. This framework allows us to formalize contrary to duty obligations. Representation results are proved.
%U http://arxiv.org/abs/0808.3072v1