Locally-ringed space locally isomorphic to Spec(A) (affine scheme). Grothendieck EGA 1960s. Unifies varieties over ℂ with arithmetic geometry over ℤ.
Locally-ringed space locally isomorphic to Spec(A) (affine scheme). Grothendieck EGA 1960s. Unifies varieties over ℂ with arithmetic geometry over ℤ.