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authorGravatar Matej Kosik <m4tej.kosik@gmail.com>2015-11-03 13:25:42 +0100
committerGravatar Hugo Herbelin <Hugo.Herbelin@inria.fr>2015-12-10 09:35:12 +0100
commit27c19fffda5c5b1f119a1b2115915b330fdfe1ba (patch)
tree9c3389233a0984d49b97550659c618f2a73ce417 /doc
parent420e750c4ef3be1d562e1729e5ec6adf94795913 (diff)
COMMENT: question
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@@ -828,6 +828,7 @@ $\forall A:\Type,\List~A$ and $\forall A:\Type,A\ra\List~A\ra\List~A$ are constr
\paragraph[Definition]{Definition\index{Positivity}\label{Positivity}}
The type of constructor $T$ will be said to {\em satisfy the positivity
condition} for a constant $X$ in the following cases:
+% QUESTION: Why is this property called "positivity"?
\begin{itemize}
\item $T=(X~t_1\ldots ~t_n)$ and $X$ does not occur free in