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-rw-r--r--doc/not-implemented.tex3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/not-implemented.tex b/doc/not-implemented.tex
index baa8eba..4b38647 100644
--- a/doc/not-implemented.tex
+++ b/doc/not-implemented.tex
@@ -85,6 +85,9 @@ more about this, I refer you to Wikipeida.
\mbox{lcm}(a, b) = \frac{\lvert a \cdot b \rvert}{\mbox{gcd}(a, b)}
}\)
+Be aware, {\tt zgcd} can return zero. If this
+is ignored.
+
\newpage
\section{Modular multiplicative inverse}