Merge branch 'AndreasFMueller:master' into master

2 files changed, 57 insertions, 0 deletions

diff --git a/buch/papers/kreismembran/images/TikzSaite.pdf b/buch/papers/kreismembran/images/TikzSaite.pdf
new file mode 100644
index 0000000..f95ceb9
--- /dev/null
+++ b/buch/papers/kreismembran/images/TikzSaite.pdf
diff --git a/buch/papers/kreismembran/images/TikzSaite.tex b/buch/papers/kreismembran/images/TikzSaite.tex
new file mode 100644
index 0000000..bf3d8f6
--- /dev/null
+++ b/buch/papers/kreismembran/images/TikzSaite.tex
@@ -0,0 +1,57 @@
+% vim: ts=2 sw=2 et :
+\documentclass[tikz, border=2mm]{standalone}
+
+\usepackage{times}
+\usepackage{txfonts}
+
+\begin{document}
+  \begin{tikzpicture}[
+      axis/.style = {very thick, -latex},
+      axis tick/.style = {
+        draw, draw = black, fill = black, rectangle,
+        inner sep = 0pt,
+        minimum height = 2mm,
+        minimum width = 1pt,
+      },
+      string/.style = {
+        ultra thick, draw = black,
+      },
+      string end/.style = {
+        string, circle, fill = gray,
+        inner sep = 0pt, minimum size = 1mm,
+      },
+      force/.style = {
+        very thick, draw = gray, -latex,
+      },
+    ]
+
+    % axes
+    \draw[axis] (0, 0) -- (8cm, 0) node[right] {$x$};
+    \draw[axis] (0, 0) -- (0, 5cm) node[above] {$u(x, t)$};
+
+    % axes ticks
+    \node[axis tick, label = {-90:$x_0$}] at (2cm, 0) {};
+    \node[axis tick, label = {-90:$x_0 + dx$}] at (6cm, 0) {};
+
+    % string
+    \coordinate (A) at (2cm, 2cm);
+    \coordinate (B) at (6cm, 4cm);
+
+    \draw[string] (A) to[out = 40, in = 200] (B);
+
+    \draw[force] (A) -- ++(220:15mm) node[gray, below right] {$T_1$};
+    \draw[force] (B) -- ++(20:15mm) node[gray, above left] {$T_2$};
+
+    \draw[dashed, gray, thick] (A) -- ++(-15mm, 0);
+    \draw[gray, thick] (A) ++ (-7mm,0) arc (180:220:7mm)
+      node[midway, left] {$\alpha$};
+
+    \draw[dashed, gray, thick] (B) -- ++(15mm, 0);
+    \draw[gray, thick] (B) ++ (7mm,0) arc (0:20:7mm)
+      node[pos = 0, below] {$\beta$};
+
+    \node[string end, label={110:$P_1$}] at (A) {};
+    \node[string end, label={110:$P_2$}] at (B) {};
+
+  \end{tikzpicture}
+\end{document}