Exercise 2.3.15 (Prime subfield)

Question

What is the prime subfield of $\mathbb{R}$? Of $\mathbb{C}$?

Hassaan Naeem · Accepted Answer

extbf{Solution:}
For $\mathbb{R}$ it is $\mathbb{Q}$. For $\mathbb{C}$ it is also $\mathbb{Q}$.
See 	extbf{Lemma 2.3.16}.

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