LaTeX.org

Thank you, skip,

after carefully examining your code, I decided to switch orders, resulting in an alignment by the top, which was my purpose.
\begin{multicols}{2}
\begin{align*}
% some equations
\end{align*}
\vfill
\columnbreak
\begin{align*}
% related equations
\end{align*}
\vspace*{\fill ...

In fact, some rather odd problem remains:
When I use this snippet of code

\AtBeginSection[]
{
\begin{frame}
\frametitle{\sectiontitle}
\tableofcontents[currentsection,hideothersubsections,]
\end{frame}
}
LateX will not print the title of the new session that is about to begin, but rather the ...

frabjous ,

this solved my problem. I could even easily extend the functionality to subsectiontitles ...

I don't quite grasp the exact syntax of the commands you gave, but I encountered those while searching on "\sectionmark" which was the closest I got to a "solution" after literally hours of ...

Many a thankyous, Loicus for this most useful post.
I'm only just beginning with Latex and it's fascinating.