# A schema whose underlying space is the product of the underlying spaces of the schemas

We know that the product of two spectral topological spaces is spectral.

• Yes $$X$$ is the underlying space of the schema $$mathrm {Spec} , mathbb {Z}[x]$$, what is a simple example of an affine scheme whose underlying space is $$X times X$$?
• Yes $$X$$ is the underlying space of the schema $$mathrm {Spec} , mathbb {C}[x]$$, what is a simple example of an affine scheme whose underlying space is $$X times X$$?