  Let $(X,S)$ be an isolated complete intersection singularity of dimension
$n$, and let $f:(X,S)\rightarrow (\mathbb{C}^{n+1},0)$ be a germ of
$\mathscr{A}$-finite mapping. In this master's degree final project, our main
contribution is that we show the case $n=2$ of the general Mond conjecture,
which states that $\mu_I(X,f)\geq \text{codim}_{\mathscr{A}_e}(X,f)$, with
equality provided $(X,f)$ is weighted homogeneous. Before this project, the
only known case for which the conjecture was known to hold is in the case that
$n=1$ and $(X,S)$ is a plane curve.
