2.3 Conditional lower previsions
Let 
be a subset of the sampling space 
, and consider a gamble 
on 
. Walley's theory of coherent lower previsions gives two different interpretations of the conditional lower prevision 
of 
given 
: the updating and the contingent one. Under the contingent interpretation, 
is our subject's current supremum buying price for the gamble 
contingent on 
, that is, the supremum value of such that the gamble is desirable for our subject.
In order to relate the subject's ...
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