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1d
answered Find the fixed field of the following subgroup?
2d
answered A line avoiding an Algebraic group
Feb
11
answered Is it correct to say gcd$(r, 0)$? The definition says greatest common divisor of nonzero integers.
Feb
10
answered Prove that the four roots of unity form an abelian multiplicative group
Feb
9
answered Always real valued complex function
Feb
9
answered Fixed subfield of the field of rational functions
Feb
7
answered Why does the equality not hold for $(A \times B ) \cup ( C \times D ) \subset ( A \cup C ) \times ( B \cup D )$
Feb
5
answered What does this notation mean on this derivative question?
Feb
5
answered Show that the elements of the form $1+\zeta + \zeta^2 + \dots + \zeta^m$, with $1 \leq m \leq p-2$, are invertible in $\mathbb{Z}[\zeta]$
Feb
4
answered Is the map $\phi: \mathbb{P^2\rightarrow \mathbb{P^1}}$ defined by $\phi(x,y,z)=(x,y)$ birational?
Feb
4
answered How do you say in a correct way using some technique?
Feb
4
answered A nontrivial solution to the quadratic form $x^2 - xy + y^2$ over the finite field $𝔽_p$ with $p ≡ 1 \pmod3$ a prime
Feb
2
answered Modulus Notation Division
Feb
1
answered Why is the set of units of integer quaternions isomorphic to the quaternion group of order 8?
Jan
31
answered Easy computational example of first cohomology group: Is this how we do it?
Jan
31
answered Upper bound on exact power of wild prime that divides the different
Jan
31
answered Solving $12x \equiv 20 \pmod{38}$
Jan
28
answered examples of unramified extensions of $\mathbb{Q}_p$
Jan
28
answered Extending $2$-adic valuation to a finite extension of $\mathbb Q$.
Jan
27
answered Isn't the structure of $\mathrm{Gal}(\mathbb{Q}(\sqrt2,\sqrt3)/\mathbb{Q}(\sqrt3))$ just the structure of $\mathrm{Gal}(\mathbb{Q}(\sqrt2))$?