diff --git a/source/numerics.tex b/source/numerics.tex
index 745e4b43a6..288607d71e 100644
--- a/source/numerics.tex
+++ b/source/numerics.tex
@@ -14236,7 +14236,7 @@
 
 \begin{itemdescr}
 \pnum
-These functions performs an updating matrix-vector product.
+These functions perform an updating matrix-vector product.
 
 \pnum
 \effects