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2024-11 Rationals from real polynomials

Find all polynomials $P$ with real coefficients such that $P(x) \in \mathbb{Q}$ implies $x \in \mathbb{Q}$ .

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One thought on “2024-11 Rationals from real polynomials”

khbang01 September 11, 2024 at 8:23 pm

Can we consider the codomain of P(x) to be \mathbb{C}?

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