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-rw-r--r--doc/refman/RefMan-cic.tex5
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/refman/RefMan-cic.tex b/doc/refman/RefMan-cic.tex
index 834c8273a5..505587988c 100644
--- a/doc/refman/RefMan-cic.tex
+++ b/doc/refman/RefMan-cic.tex
@@ -62,6 +62,11 @@ Formally, we call {\Sort} the set of sorts which is defined by:
\index{Set@{\Set}}
Their properties are defined in Section~\ref{subtyping-rules}.
+% TODO: Somewhere in the document we should explain:
+% - what concrete actions (in *.v files) cause creation of new universes
+% - different kinds of relationships between universes (i.e. "max" and "succ")
+% - what are all the actions (in *.v files) from which those relationships arise
+
The user does not have to mention explicitly the index $i$ when referring to
the universe \Type$(i)$. One only writes \Type. The
system itself generates for each instance of \Type\ a new