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This is my first message on TeX exchange, please forgive me if the format of my question is not appropriate (I don't even know how to produce a LaTeX compilation of the message)

I am using the following preamble with LaTeX (MikTeX distribution):

\documentclass[a4paper,12pt]{amsart}
\usepackage{color,graphicx}
\usepackage{amscd,amssymb,amsthm,latexsym,stmaryrd,xypic,amsmath}
\xyoption{all}
\usepackage{verbatim}
\usepackage{tikz-cd}

At some point, I am using the letters $\mathfrak{p},\mathfrak{P}$ and $\mathcal{P}$ in two contexts:

1) these letters appear by themselves : let $\mathfrak{P}$ be an ideal...

2) they appear in indices: let $[x]_\mathfrak{P}$ be the class of $x$ modulo $\mathfrak{P}$.

My problem is that I would like to reduce the size of these letters only when used for indexing (as in 2)). I tried \footnotesize, \small, \fontsize{12}{8}...but nothing works. The size stays the same over and over...

I start suspecting that I have to create a new font \mathfrak and \mathcal, for example by modifying the existing defining files for these fonts and force a smaller size , but it is way out of my league.

Could someone tell me how to solve this? Thanks!

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    As always on the site please pot full but minimal examples, not sniplets like this. We cannot test them without guessing and that is a waste of time. Pluse NEVER rely on _\mathfrak{P} working always use _{\mathfrak{P}} it is pure luck that it currently works and might not in the future.
    – daleif
    Mar 18, 2020 at 16:32
  • Additionally whay are you using both xypic and tikz-cd at the same time? Use the latter, it is vastly more powerfull.
    – daleif
    Mar 18, 2020 at 16:33
  • I tried also with _{\mathfrak{P}}, it does not work either...
    – GreginGre
    Mar 18, 2020 at 16:35
  • As I said: full minimal example, otherwise people will just ignore your question as there are many other questions to answer.
    – daleif
    Mar 18, 2020 at 16:36

1 Answer 1

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Are you saying that x_{\mathfrak{P}} the P is not smaller than \mathfrak{P} ? That would be very odd. However x_{\scriptscriptstyle\mathfrak{P}} will make it smaller still.

Note that x should not be braced, but \mathfrac{P} should be braced in x_{\mathfrak{P}}

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  • I tried the \scriptscriptstyle solution, and it works perfectly, thanks :-)
    – GreginGre
    Mar 18, 2020 at 16:43

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