Mismatched Math Environment

A math environment is closed by the wrong \end{…}, is never closed, or an \end{…} appears without its \begin{…}.

Q-22-3 — Mismatched Math Environment

A math environment is closed by the wrong \end{…}, is never closed, or an \end{…} appears without its \begin{…}.

What this means

\begin{name} and \end{name} must pair up exactly. When they do not, the extent of the environment is a guess, so quarto-math keeps the whole span verbatim rather than pick a layout that might be wrong, and reports the mismatch at the environment.

Why this happens

Common causes: \begin{aligned} … \end{align} after editing one of the two, a missing \end{…} at the end of a display equation, or a stray \end{…} left behind after deleting a \begin{…}.

How to fix it

Make the \begin and \end names identical and make sure every \begin has an \end inside the same $$ … $$ block.

Where it is reported

Math diagnostics point into the .qmd at the exact characters inside the $…$ or $$…$$ block, including math that spans several lines or sits inside a block quote or list item. When a \newcommand macro is involved, a problem inside the macro body points at the definition and a problem in a macro argument points at the use.