  In his paper "A Construction for Coisotropic Subalgebras of Lie Bialgebras",
Marco Zambon gave a way to use a long root of a complex semisimple Lie
biaglebra $\mathfrak{g}$ to construct a coisotropic subalgebra of
$\mathfrak{g}$. In this paper, we generalize Zambon's construction. Our
construction is based on the theory of Lagrangian subalgebras of the double
$\mathfrak{g}\oplus\mathfrak{g}$ of $\mathfrak{g}$, and our coisotropic
subalgebras correspond to torus fixed points in the variety
$\mathcal{L}(\mathfrak{g}\oplus\mathfrak{g})$ of Lagrangian subalgebras of
$\mathfrak{g}\oplus\mathfrak{g}$.
