Another look at hyperconvex hulls
The talk will be devoted to a certain generalization of the notion of
a metric space, inspired by applications to taxonomy, in which one can
introsuce an analogue of the notion of hyperconvexity. We will start
with an a bit atypical angle on Isbell's hyperconvex hull, and then we
will proceed to describe some problems with transferring his ideas to
the generalization in question.