\chapter{Appendix: Package \pkg{thmlist}}
This template has preset two \emph{styles} of theorem environment via the \pkg{thmlist} package, you can create a series of environments with the two styles
\begin{verbatim}
\mdflist{theorem, lemma, definition, proposition, postulate;
Theorem, Lemma, Definition, Proposition, Postulate;
DarkGreen, MidnightBlue, MidnightBlue, DarkOliveGreen, Indigo}
\amslist{remark, example, problem, solution;
Remark, Example, Problem, Solution;
DarkRed, Teal, Black, Black}
\end{verbatim}
You can add the environments like the two commands above as you need. For more information, please refer to the document of the \pkg{thmlist} package. The following are the effects of the two styles.
The next five environments show the style of the \pkg{mdframed} package.
\begin{theorem}[The Theorem Environment]\leavevmode\newline
From WikipediA: A theorem is a statement that has been proved, or can be proved.
\end{theorem}
\begin{lemma}[The Lemma Environment]\leavevmode\newline
From WikipediA: In mathematics, informal logic and argument mapping, a lemma (pl.: lemmas or lemmata) is a generally minor, proven proposition which is used as a stepping stone to a larger result. For that reason, it is also known as a ``helping theorem'' or an ``auxiliary theorem''.
\end{lemma}
\begin{definition}[The Definition Environment]\leavevmode\newline
From WikipediA: A definition is used to give a precise meaning to a new term, by describing a condition which unambiguously qualifies what a mathematical term is and is not.
\end{definition}
\begin{proposition}[The Proposition Environment]\leavevmode\newline
From WikipediA: A proposition is a central concept in the philosophy of language, semantics, logic, and related fields, often characterized as the primary bearer of truth or falsity.
\end{proposition}
\begin{postulate}[The Postulate Environment]\leavevmode\newline
From WikipediA: A postulate is a statement everyone agrees to be correct.
\end{postulate}
The next four environments show the style of the \pkg{amsthm} package.
\begin{remark}[The Remark Environment]\leavevmode\newline
From Math StackExchange: The remark device is used for material that is is too long to be included in parentheses, while it deserves greater prominence than a footnote.
\end{remark}
\example{
From Cambridge Dictionary: The example is a way of helping someone to understand something by showing them how it is used.}
\problem{
From Springer: A problem is generally considered to be a task, a situation, or person which is difficult to deal with or control due to complexity and intransparency.}
\solution{The quick brown fox jumps over the lazy dog.}