Given a curve $\mathcal{L}$, define two functions of distance transform $\kappa_{+}$ and $\kappa_{-}$ on \mathbb{R}^{2} as
$\kappa_{+}(x) = d(x,\mathbb{R}^{2}\D), x \in \mathbb{R}^{2}, (1)$
$\kappa_{-}(x) = d(x,\mathbb{R}^{2}\D), x \in \mathbb{R}^{2}, (2)$
I get following error:
Undefined sequence
Best Answer
You need to be careful to use
mathmode
correctly; in particular,\mathbb
needs to be inmathmode
.You didn't specify what the macro
\D
does, but it looks as if would you like to use thealign
environment, as follows