# How can I use usepackage only in \mathbb?

I want to use these mathematical sets that are shown in the picture:

I used the following: \usepackage{pxfonts}, but then the whole context changed.

I want the original LaTeX font, but when I use the \mathbb{}, show the ones in the image. Can you help me, please?

• Welcome to TeX:SE! Please show us what you try so far. The best as small but complete document beginning with \documentclass and ending with \end{document}. In preamble let it load only to your problem relevant packages. – Zarko Dec 1 '20 at 16:04
• Your question is not clear. The following example works as expected: \documentclass{article} \usepackage{amssymb} \usepackage{pxfonts} \begin{document} $\mathbb{Z Q C E N}$, $a^2 + b^2 = c^2$ \end{document}. What problem(s) you have? – Zarko Dec 1 '20 at 16:11
• I think he wants to use the default font throughout the whole document, except when calling the \mathbb{} command, where he wants to use the font from the pxfonts package, which I think it is Palatino. This is very easily done with XeLaTex, if he is willing to compile with it. – Luis Sibaja Dec 1 '20 at 16:22

You can use the package mathalpha with option bb=px.
\documentclass{article}
$$\mathbb{ZQCEN}$$