mathstodon.xyz is back up after a few hours of downtime due to a full disk.
It was preview cards again: is mastodon supposed to be clearing them up? There's no tootctl task to remove them.

A Mastodon instance for maths people. The kind of people who make $\pi z^2 \times a$ jokes.

Use $ and $ for inline LaTeX, and $ and $ for display mode.