diff --git a/.gitignore b/.gitignore
index 47b3d4ede..1a38620fe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,5 @@ slides.aux
 slides.log
 slides.nav
 slides.out
-slides.pdf
 slides.snm
 slides.toc
diff --git a/slides.pdf b/slides.pdf
new file mode 100644
index 000000000..384db2a6e
Binary files /dev/null and b/slides.pdf differ