We don’t know why librarians get such a bad rep. For whatever reason, when you think of a librarian, most people think of a stuffy, overly bookish type person—certainly not an unsung hero of comedy.

The original version of this story appeared in Quanta Magazine. All of modern mathematics is built on the foundation of set theory, the study of how to organize abstract collections of objects. But in ...

Abstract: Constrained multi-objective optimization problems (CMOPs) generally contain multiple constraints, which not only form multiple discrete feasible regions but also reduce the size of optimal ...