For my chemistry course, our lab-leader insists that we use roman numerals for the numbering of reaction equations, and arabic numerals for the numbering of mathematical equations. So when I write
some reaction equation
I would like LaTeX to use roman numerals to number the equation, and I would like them to follow a counter different from the counter for the arabic numerals. Can I customize it in this way, or if it's difficult, how could I do it manually?
Also, I would like the mathematical equations to be numbered, for instance,
(1-1) instead of
(1)when it's the first mathematical equation of section 1. How can I do that?