I have that the graph of a function $G(f) = \{ (x, f(x)) : x \in \mathbb{R} \} $ for $f : \mathbb{R} → \mathbb{R} $ is such that $G(f) ∈ B \otimes B$. Here $B$ is the $\sigma$-algebra of Borel sets. How can I go about showing that $f$ is Borel-measurable? Thanks in advance!
2026-03-25 20:35:23.1774470923
Getting Borel-measurability from a product measure space
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