LaTeX multicolumn block in Pandoc markdown [duplicate]

Answer 1

You can use the trick discussed here

Basically, Pandoc is coded to recognize \begin and \end, so instead define \Begin and \End in the header and use those.

E.g.:

---
papersize: a4
documentclass: article
header-includes:
    - \usepackage{multicol}
    - \newcommand{\hideFromPandoc}[1]{#1}
    - \hideFromPandoc{
        \let\Begin\begin
        \let\End\end
      }

...

H1
==============

H2 - A
--------------

\Begin{multicols}{2}

### H3 - a
Blah blah blah...

### H3 - b
Blah blah blah...

### H3 - c
Blah blah blah...

\End{multicols}

H2 - B
--------------
Blah blah blah...