diff --git a/.gitignore b/.gitignore
index 2a577dc..5e4e331 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,6 @@
 *.out
 *.synctex.gz
 *.bak
-*.pdf
+Bachelorkolloquium.pdf
 *.vrb
 .nfs*
diff --git a/img/aggregation-patternmatching.pdf b/img/aggregation-patternmatching.pdf
new file mode 100644
index 0000000..3b9e3c7
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diff --git a/img/sliding-window.pdf b/img/sliding-window.pdf
new file mode 100644
index 0000000..832d7c7
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diff --git a/img/slidingvstumblingwindow.pdf b/img/slidingvstumblingwindow.pdf
new file mode 100644
index 0000000..5847670
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diff --git a/img/triple-spo.pdf b/img/triple-spo.pdf
new file mode 100644
index 0000000..f85926a
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