updates
diff --git a/.Rproj.user/441ADA46/sources/s-FE609B0F/A4381D75-contents b/.Rproj.user/441ADA46/sources/s-FE609B0F/A4381D75-contents
new file mode 100644
index 0000000..144be67
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+++ b/.Rproj.user/441ADA46/sources/s-FE609B0F/A4381D75-contents
@@ -0,0 +1,87 @@
+\documentclass{report}
+\usepackage[most]{tcolorbox}
+\usepackage{lmodern}
+\usepackage{lipsum}
+\usepackage[explicit]{titlesec}
+\usepackage{varwidth}
+
+\tcbset{
+ orange/.style={
+ enhanced,
+ colback=orange!10,
+ colframe=orange,
+ fonttitle=\bfseries,
+ colbacktitle=orange!40,
+ coltitle=black,
+ attach boxed title to top left={%
+ yshift*=-\tcboxedtitleheight/2,
+ xshift=5mm},
+ boxed title style={colframe=gray}
+ }
+}
+
+\newtcbtheorem[auto counter]{mylemma}{Lemma}{%
+ orange
+ }{lm}
+
+\titleformat{\chapter}[display]
+ {\normalfont\Large\bfseries}
+ {}
+ {}
+ {%
+ \begin{tcolorbox}[orange, halign=center, valign=center, title=test, overlay={\node[draw=gray, fill=orange!40, rounded corners, anchor=east, font=\small\bfseries] at ([xshift=-5mm]frame.south east){2016-2017};}]%, title=Title]
+ #1
+ \end{tcolorbox}%
+ }
+
+\titleformat{\section}
+ {\normalfont\large\bfseries}{}{0em}
+ {%
+ \setbox0=\hbox{\large\bfseries\thesection}%
+ \begin{tikzpicture}
+ \draw[orange, ultra thick](0,0) -- ++(0:\linewidth);
+ \node[draw=orange,
+ rounded corners,
+ fill=orange!10,
+ ultra thick,
+ anchor=west,
+ outer sep=0pt
+ ] {\thesection\hspace{.5em}\hangindent\wd0\strut#1\strut};
+ \end{tikzpicture}%
+ }
+
+\titleformat{name=\section,numberless}[display]
+ {\normalfont\Large\bfseries}{}{0em}
+ {%
+ \begin{tikzpicture}
+ \draw[orange, line width=1mm](0,0) -- ++(0:\linewidth);
+ \node[draw=orange,
+ rounded corners,
+ fill=orange!10,
+ line width=1mm,
+ anchor=west,
+ outer sep=0pt
+ ] {\strut#1\strut};
+ \end{tikzpicture}%
+ }
+\titlespacing*{\section}
+ {0pt}{4.5ex plus 1ex minus .2ex}{1ex plus .2ex}
+
+\begin{document}
+
+\chapter*{Diagonalizar matrices}
+\section{Test numbered section}
+\begin{mylemma}{Test}{a}
+\lipsum[3]
+\end{mylemma}
+
+\begin{mylemma}{Test}{a}
+\lipsum[3]
+\end{mylemma}
+
+\section*{Test unnumbered section}
+\lipsum[4]
+%\section{Test numbered section with a long title; in fact, it spans two lines}
+%\lipsum[4]
+
+\end{document}