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I am trying to write a hollow number 1 for my unit step function. Intuitively, since \mathbb{R} provides the nice symbol for real numbers, I would imagine \mathbb{1} do the same. However:

Since the input is $u(t) = \mathbb{1}(t)$, $U(s) = \frac{1}{s}$.

Very very weird mathbb 1

What should I use instead?

Power_tile
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  • Welcome to TeX.SE. – Mico Sep 07 '23 at 22:36
  • You could load the dsfont package and execute \mathds{1}. – Mico Sep 07 '23 at 22:38
  • @Mico Thank you, but dsfont somehow isn't preinstalled in overleaf. Ended up using mathbbol instead. – Power_tile Sep 07 '23 at 23:01
  • You wrote, "dsfont somehow isn't preinstalled in overleaf." Are you sure? \documentclass{article} \usepackage{dsfont} \begin{document} $\mathds{1}$ \end{document} compiles just fine on my Overleaf account. – Mico Sep 07 '23 at 23:20

1 Answers1

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Found the solution in Overleaf's great, big list of LaTeX symbols document, table 316. Apparently not all packages include hollow versions of numbers. Refer to this document for more styles.

\usepackage{mathbbol}

% ...


\mathbb{1}
Power_tile
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