changes (suggested) by Soren Larsen

1 files changed, 1 insertions, 1 deletions

diff --git a/Doc/libsys.tex b/Doc/libsys.tex
index fc71139..ffda68d 100644
--- a/Doc/libsys.tex
+++ b/Doc/libsys.tex
@@ -88,7 +88,7 @@ determines how often the interpreter checks for periodic things such
 as thread switches and signal handlers.  The default is 10, meaning
 the check is performed every 10 Python virtual instructions.  Setting
 it to a larger value may increase performance for programs using
-threads.  Setting it to a value <= 0 checks every virtual instruction,
+threads.  Setting it to a value $\leq 0$ checks every virtual instruction,
 maximizing responsiveness as well as overhead.
 \end{funcdesc}