diff --git a/sose2020/ana/uebungen/ana3.pdf b/sose2020/ana/uebungen/ana3.pdf
index 4504704..f2a414f 100644
Binary files a/sose2020/ana/uebungen/ana3.pdf and b/sose2020/ana/uebungen/ana3.pdf differ
diff --git a/sose2020/ana/uebungen/ana3.tex b/sose2020/ana/uebungen/ana3.tex
index b76d123..3fc9d3d 100644
--- a/sose2020/ana/uebungen/ana3.tex
+++ b/sose2020/ana/uebungen/ana3.tex
@@ -88,8 +88,8 @@
             \item Dreicksungleichung:
                 \begin{align*}
                     \Vert x + y \Vert \quad &= \quad d(x + y, 0) \\
-                                            &\stackrel{\text{E1}}{=} \quad d(y, -x) \\
-                                            &\stackrel{d \text{ Metrik}}= \quad  d(-x, y) \\
+                                            &= \quad d(y - (-x), 0) \\
+                                            &\stackrel{\text{E1}}{=} \quad d(-x, y) \\
                                             &\stackrel{d \text{ Metrik}}\le \quad d(-x, 0) + d(0, y) \\
                                             &\stackrel{\text{E2}}{=} \quad d(x, 0) + d(y, 0) \\
                                             &= \quad \Vert x \Vert_d + \Vert y \Vert_d