arrow at f is now dashed; commented looping arrow in middle out

tikz/tensor-diagram/tensor-diagram.tex

@@ -15,12 +15,11 @@
     \node (B) at (4,2) {$Z'$};
     \node (C) at (2,0) {$Z$};
 
-    \draw[->, ultra thick] (2.1,0.7) arc(-70:260:0.4);
+    % Round loop arrow in middle:
+    %\draw[->, ultra thick] (2.1,0.7) arc(-70:260:0.4);
 
-    % Draw the triangle
-    \path[fill=blue!10, fill=blue!5]  (A) -- (B) -- (C) -- (A);
-    \draw[ultra thick, xvectorcolor, arrows={-latex}]  (A) -- (C) node[sloped,midway,below=-0.1cm] {$T$};
-    \draw[ultra thick, blue!80,      arrows={-latex}]  (C) -- (B) node[sloped,midway,below=-0.1cm] {$f$};
-    \draw[ultra thick, red!80, arrows={-latex},line cap=round]  (A) -- (B) node[sloped,midway,right=-0.3cm,above=-0.1cm] {$T'$};
+    \draw[ultra thick,xvectorcolor,         arrows={-latex}]  (A) -- (C) node[sloped,midway,below=-0.1cm] {$T$};
+    \draw[ultra thick,blue!80, dashed,      arrows={-latex}]  (C) -- (B) node[sloped,midway,below=-0.1cm] {$f$};
+    \draw[ultra thick,red!80,line cap=round,arrows={-latex}]  (A) -- (B) node[sloped,midway,right=-0.3cm,above=-0.1cm] {$T'$};
 \end{tikzpicture}
 \end{document}