Math & Science ⇒ non-italic helvetic math font entire document

[edilonjunior]

I'm trying to make a document in school test format. So I do not want the text in mathematical mode to have the italic format and also be bold, the source of the whole document should be helvetic. The bold I already managed to solve by inserting \ boldmath shortly after \ begin {document}. The "mathastext" package solves a lot, but I can not configure fonts in math mode to be smaller with the "\ DeclareMathSizes {13} {12} {10} {9}" command. My code is below

Code: Select all

\documentclass[a4, 12pt]{article}
\usepackage[top=1cm, bottom= 1cm, left=1cm, right= 1cm]{geometry}
\usepackage[brazil]{babel}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\usepackage{arev} %quase arial
\usepackage{multicol}
\usepackage{array}
\usepackage{mathastext}
\usepackage{chemfig}
%==================================================
\renewcommand{\rmdefault}{phv}% arial math mode
\setlength\parindent{0pt}
\setlength{\columnseprule}{1pt}
\setatomsep{10mm}
%==================================================
\DeclareMathSizes{9}{8}{7}{7} %don't work with mathastext
%==================================================
\begin{document}
\begin{multicols}{2}
\boldmath

1) Certo átomo possui 17 prótons, 20 nêutrons e 17 elétrons. Qual dos átomos representados abaixo é seu isótono?\\

a) $_{19}^{40}K$\\% subscript and superscrip are very large

b) $_{20}^{42}Ca$\\

\end{multicols}
\end{document}

[Stefan Kottwitz]

Hi Edilon,

welcome to the forum!

For \DeclareMathSizes, take the font size option of the class as the first argument. (Or the currently used font size)

The syntax is:

\DeclareMathSizes{current text size}{math size}{script size}{script script size}

It doesn't scale the text size, that's why one doesn't adjust the text size. The text size argument is for defining, for which current text size which math size shall be used. Try:

\DeclareMathSizes{12}{12}{7}{7}

I get:

math-font-size.png (15.73 KiB) Viewed 4305 times

Stefan