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 Apr 23 asked Example of a field extension $K/F$ such that $K$ is the splitting field of some (non-separable) polynomial in $F$, but not Galois over $F$? Apr 22 asked $K/\mathbb{Q}$ contains a complex number - is complex conjugation in $\text{Aut}(K/\mathbb{Q})$? Apr 16 asked Subgroups of $\mathbb{Z}_p^n$ Apr 1 asked Separable polynomials are the product of the minimal polynomials of their roots? Mar 25 asked Does this inequality involving the sum of components of a vector and its norm have a name? Mar 7 asked Components of a bounded vector must be bounded Feb 25 asked Elegant proof that maximum of sums is, at most, sum of maximums Feb 17 asked More elegant way to make the argument that $\mathbb{Q}[x,y]/\langle x,y \rangle \cong \mathbb{Q}$ Feb 1 answered Could I do this to an infinite series? Apr 30 answered When to use the $\equiv$ symbol (such as in $5^{6}$ $\equiv$ 1 mod 7) vs = Dec 15 answered To which group is $G/\ker \phi$ isomorphic to? Nov 30 asked Meaning of the word “conjugate” across mathematics? Nov 24 asked Solutions of $a^{2} - 2b^{2} \equiv 0$ mod $p$ Jun 7 answered What is the relationship between the area of a triangle and an area of a segment of a circle? May 22 asked How to distinguish between knots and links based on knot diagrams/projections Apr 10 asked Why is proof of the [topological] closed graph theorem incorrect? Oct 14 asked How can I better understand manipulating “operators” in mathematical relations? Jul 8 asked What “is” a matrix in the context of a vector space? Aug 22 asked What are the technical reasons that we must define vectors as “arrows” and carefully distinguish them from a point? Mar 28 asked Notation for factorial-type pattern with a skip/step of two instead of one?