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How to type double-struck 1?

How can I type double struck 1, i.e. indicator function in eq?

I tried to search for this the whole morning but failed. Things I tried:

\mathbb{1}, \mathbbm{1}, \cmathbb{1}. \mmathbb{1}, \Bbb{1}, \char"1D7D9 (this should be the correct UNICODE, but it only outputs a mysterious character).


1 Answer


abaginski Points570

Hi! I’m not sure if this will help, but I just copied it from a web page and pasted it in. It seemed to work fine in both the Title and text areas.

Good luck!


jasperhyp commented

Ah that's a great idea. I was too dumb not having done this haha.

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