I just encountered the following when editing a question:
This is how I ended up with what I had:
- Start with
$sin(t), 0<=t<=pi$(without the quotes that I obviously have in my source text, so it actually renders the math)
- Add a backslash before
- Use the arrow keys and backslash to remove the rightmost
<=, and replace it with
- Do the same with the left
<=. Remember to add a space after this
\leqtisn't a command
It took me a couple of minutes of testing to see what had actually happened. As I type the second
\leq, for a brief moment it says
\let\leq\pi. This effect persists even after the command has vanished. I can't believe I haven't encountered it before, but there it is.
I don't know whether the
\let command is meant to persist after it has been removed, but it sounds strange to me. What do you think?