12

I cannot find this P:

enter image description here

My \mathbb{P} and \mathcal{P} are:

enter image description here

I have found similar questions related to finding specific symbol or some P, but none of them looks for this P or shows a way to look for your specific symbol.

3
  • 1
    Hi and welcome. It's most likely \mathbb{P} when some font package is loaded. You can (a) look for a list of available fonts in latex and find your P there, or (b) ask the author for the source code in case this is a preprint/lecture note, look for the journal template in case this is a journal paper.
    – Symbol 1
    Jun 20, 2021 at 17:08
  • 6
    That looks like the ancient I\!P hack we used to use in the 1980s before the AMS fonts were available. If you have that in a PDF and cut and paste the text do you get P or I P ? Jun 20, 2021 at 17:48
  • Unless you have very specific reasons to prefer this specific letter (for example, aesthetic preference), I would recommend going with \mathbb{P} instead. I would consider \mathbb{P} and \text{I\kern-0.15em P} to be semantically the same letter with the former having the advantage of being “standard” and thus much easier to achieve. Jun 21, 2021 at 8:13

3 Answers 3

8

You can try this:
IP

\documentclass[12pt]{article}
\begin{document}
    I\kern-0.15em P
\end{document}

If you want to use it in math mode several times, you may want to create a macro.

\documentclass[12pt]{article}
\usepackage{amsmath}
\newcommand{\probP}{\text{I\kern-0.15em P}}
\begin{document}
    $\probP(A)=0.5$
\end{document}

IP macro

5
  • 1
    +1. Your conjecture is also main guess as to how the character shown in the OP's screenshot was created. I might also play with I\kern-.2emP.
    – Mico
    Jun 20, 2021 at 18:56
  • 1
    How does this work with text-selection and copying? Just curious... Jun 21, 2021 at 17:28
  • Sorry, I don't understand your question. If you mean, copying from PDF file, I don't know, maybe you can try by yourself. But the point is to produce a specific character. See David Carlisle's comment on OP.
    – SebGlav
    Jun 21, 2021 at 18:12
  • I don't know if it's just a quirk of antialiasing, but the bulge where the serifs overlap is hideous at this scale
    – Chris H
    Jun 22, 2021 at 8:25
  • You're right, but it should not, since there's no bulge either on the I or on the P. Probably an issue of antialiasing, as you said. And well, it's just a cheat, not a real typeface.
    – SebGlav
    Jun 22, 2021 at 10:26
14

You can try dsfont package and \mathds{P} command (mathmode)

\documentclass{book}
\usepackage{dsfont}
\begin{document}
$\mathds{P}(A)=0.75$
\end{document}

enter image description here

1
6

This is s different \mathbb alphabet. I’m not sure which. The closest free one I’m aware of is the varbb alphabet of newpxmath.

\documentclass{article}
\usepackage[varbb]{newpxmath}

\begin{document}
\[ \mathbb{P} \]
\end{document}

enter image description here

The bb=pazo, bb=px and bb=mma options of mathalpha are also somewhat close, and easier to combine with a different set of math fonts. If you are using unicode-math, the \mathbb{P} of Asana Math is based on the one from Pazo.

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