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How do I type in LaTeX the 3 letters reading $ACA_0$ from the excerpt below? I believe that this is called bezpatkove pismo in the Czech language.

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  • \textsf{ACA}$_0$ or $\textsf{ACA}_0$, the sf referring to the "sans serif" font family. Other font families include roman (\textrm) and typewriter (\texttt). – Steven B. Segletes Mar 27 at 16:36
  • @StevenB.Segletes I think it should be $\mathsf{ACA}_0$. – user156344 Mar 27 at 16:48
  • @JouleV If the math and text sf-fonts are the same, and if one is not in a script style, then it makes no never mind, best I can tell. Based on the context of the OP's use case, I still lean to \textsf. – Steven B. Segletes Mar 27 at 16:53
  • @StevenB.Segletes it will make a difference \textsf would be bold if the outer text is bold also it doesn't get smaller in subscripts by default (it does with amsmath but less efficiently setting everything 4 times in a \mathchoice) – David Carlisle Mar 27 at 17:17
  • @DavidCarlisle I understand all those distinctions. My point was that even though it is presented with a subscript 0, it is not obvious to me that the OP wants to treat "ACA" as math item, in preference to a text item. He may prefer it become bolded when presented in a bold caption, for example. – Steven B. Segletes Mar 27 at 17:19

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