Three views of an <a href="https://en.wikipedia.org/wiki/antimatroid" class="extiw" title="en:antimatroid">antimatroid</a>: an inclusion ordering on its family of feasible sets, a <a href="https://en.wikipedia.org/wiki/formal_language" class="extiw" title="en:formal language">formal language</a>, and the <a href="https://en.wikipedia.org/wiki/Hasse_diagram" class="extiw" title="en:Hasse diagram">Hasse diagram</a> of the corresponding path <a href="https://en.wikipedia.org/wiki/partially_ordered_set" class="extiw" title="en:partially ordered set">poset</a>.
<a href="https://en.wikipedia.org/wiki/User:David_Eppstein" class="extiw" title="wikipedia:User:David Eppstein">David Eppstein</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
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