[d1](https://math.stackexchange.com/questions/246226/relation-between-a-generalization-of-weils-abstract-varieties-and-algebraic-sch/4287848#4287848): not an answer to a 9-year-old problem
[d2](https://math.stackexchange.com/questions/4282297/f-ast-surjective-iff-f-is-an-isomorphism-into-a-closed-set/4287862#4287862): not an answer, actually a comment