Top network posts

• 14 Does there exist a pair of infinite fields, the additive group of one isomorphic to the multiplicative group of the other?
• 13 Characteristic subgroups and automorphisms
• 12 $f(x) $ be the minimal polynomial of $a$ (algebraic element) over $\mathbb Q$ , let $b=f'(a) \in \mathbb Q(a)$ , then is $\mathbb Q(a)=\mathbb Q(b)$?
• 12 When do $P$ $\subseteq$ $N$ $\subseteq$ $M$ and $P \cong M$ imply $N \cong M$?
• 8 What is the cardinality of the set of equivalence classes of countable order types under bi-embeddability?
• 8 Can a single nontrivial identity imply associativity and commutativity?
• 7 Rings with a given number of (prime, maximal) ideals
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