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\theoremstyle{plain}
\newtheorem{thm}{Theorem}[section]
\newtheorem{Satz}[thm]{Satz}
\newtheorem{lemma}[thm]{Lemma}
\newtheorem{prop}[thm]{Proposition}
\newtheorem{cor}[thm]{Corollary}
\newtheorem{alg}[thm]{Algorithmus}
\newtheorem{qstn}[thm]{Question}
\newtheorem{theorem}[thm]{Theorem}



\theoremstyle{definition}
\newtheorem{definition}[thm]{Definition}
\newtheorem{example}[thm]{Example}
\newtheorem{remark}[thm]{Remark}


\parindent0mm


\title{Student seminar notes week \textcolor[rgb]{1,0,0}{X}}
\author{\textcolor[rgb]{1,0,0}{Your name} after the talk of \textcolor[rgb]{1,0,0}{name of speaker}}
\date{} %no need to put a date


\begin{document}
\maketitle




\end{document}