2 problems

Let $f:X\dashrightarrow C$ be a canonically fibered surface, meaning that $X$ and $C$ are irreducible, smooth and projective over $\mathbb{C}$ with dimensions $2$ and $1$, respecti…

Let $d$ be a natural number and let $\mathfrak{R}\subset [0,1]$ be a finite set of rational numbers. For a finite set $\mathfrak{R}$, write … A pair $(X,B)$ is semi-log canonical i…