diff --git a/source/numerics.tex b/source/numerics.tex
index e904b37986..65882fe500 100644
--- a/source/numerics.tex
+++ b/source/numerics.tex
@@ -6915,7 +6915,7 @@
 \pnum
 \returns
 A \tcode{vector<result_type>}
- whose \tcode{size} member returns $n$
+ whose \tcode{size} member returns $n + 1$
  and whose $ \tcode{operator[]} $ member returns $\rho_k$
  when invoked with argument $k$ for $k = 0, \dotsc, n$.
 \end{itemdescr}%