Commit 47d81be1 authored by Ralf Jung's avatar Ralf Jung
Browse files

add a comment about the 'no core' element

parent e632e566
......@@ -159,6 +159,8 @@ All cases of composition go to $\bot$.
\mcore{\exinj(x)} \eqdef{}& \mnocore &
\mcore{\bot} \eqdef{}& \bot
Remember that $\mnocore$ is the ``dummy'' element in $\maybe\monoid$ indicating (in this case) that $\exinj(x)$ has no core.
The step-indexed equivalence is inductively defined as follows:
\infer{x \nequiv{n} y}{\exinj(x) \nequiv{n} \exinj(y)}
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