Math numerals and text numerals in mtpro2

Question

I am using baskerville for my text font and mtpro2 for the math. But the numerals in text and in math are different. After looking at mtpro2 documentation I could not find an option for forcing the text numerals in the math mode. Does anyone know of a work around?

Answer 1

The following code in the preamble should do what you want:

\DeclareMathSymbol{0}{\mathalpha}{operators}{`0}
\DeclareMathSymbol{1}{\mathalpha}{operators}{`1}
\DeclareMathSymbol{2}{\mathalpha}{operators}{`2}
\DeclareMathSymbol{3}{\mathalpha}{operators}{`3}
\DeclareMathSymbol{4}{\mathalpha}{operators}{`4}
\DeclareMathSymbol{5}{\mathalpha}{operators}{`5}
\DeclareMathSymbol{6}{\mathalpha}{operators}{`6}
\DeclareMathSymbol{7}{\mathalpha}{operators}{`7}
\DeclareMathSymbol{8}{\mathalpha}{operators}{`8}
\DeclareMathSymbol{9}{\mathalpha}{operators}{`9}

This should go after you have defined the text font and loaded mtpro2

Answer 2

mtpro2 -- short for "MathTime Pro 2" -- provides mathmode fonts only. AFAIK, mtpro2 only provides "lining" (aka "titling") numerals, but not "oldstyle" (or "textstyle") numerals.

You mention that you're using a Baskerville text font: does it feature textstyle/oldstyle numerals? Textstyle numerals probably shouldn't be used in math expressions, especially those that involve subscripts and exponents (superscripts) as the ascenders and descenders of some of these numerals could give rise to confusion. (Try typesetting $6^{2^4}$ vs $6^{24}$ with textstyle numerals and not being at least slightly puzzled by the output.)

Only in places such as page numbers and in sectioning divisions is it innocuous to use textstyle numerals if a document features a fair amount of math.

There are packages, such as mathpazo, which provide the option osf to load oldstyle figures. However, they generally do so only for textmode numerals. It's probably not an accident that the mathmode numerals of the mathpazo package are all in "lining" or "titling" style.