/sci/ - Science & Math

when you write derivatives in [math]\LaTeX[/math], do you write
[eqn]
\frac{\mathrm{d}}{\mathrm{d}x}
[/eqn]
or
[eqn]
\frac{d}{dx}
[/eqn]
?

Mathematically speaking, what does bitcoin do that money can't?