2 problems

Let $\mathfrak{g}$ be a rigid Lie algebra. A Lie algebra is rational if it can be defined over the rational numbers $\mathbb{Q}$. The source also observes that the eigenvalues for…

Let $\frak{r}$ be a solvable rigid Lie algebra. Its center is the subalgebra of elements that commute with every element of $\frak{r}$. Carles's trivial-center conjecture. Every so…