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23h
answered Expressing a function in terms of compositions of three functions.
2d
answered Simultaneous equation with fractional solutions.
Jul
4
answered How many integral ideals $\mathfrak{a}$ are there with the given norm $\mathfrak{N}(\mathfrak{a})=n$?
Jul
2
answered converging power series over $p$-adic integers is a UFD
Jul
2
answered $5^m$, where m is any natural, can be expressed as the sum of two perfect squares?
Jul
1
answered Evaluating limit (iterated sine function)
Jun
26
answered Non real complex in metric completions of $\mathbb Q$
Jun
25
answered Prove that field $Q(x)$ is a field of fractions of ring $F[x]$
Jun
23
answered $\mathbb{Q}(\sqrt2) $ is isomorphic to $\mathbb{Q}(\sqrt2 +2 )$
Jun
21
answered Is there a ring homomorphism $M_2(\mathbb Z)\to \mathbb Z$?
Jun
20
answered Understanding $p$-adic fields
Jun
19
answered Is the finite union of algebraic curves an algebraic curve?
Jun
18
answered Why is this Galois group abelian?
Jun
17
answered What fraction of a sphere can an external observer see?
Jun
17
answered Primitive $p^n$-th root of unity in $\bar{\mathbb{Q}}_p$.
Jun
17
answered Proving that a binomial coefficient involving a power of $2$ is even
Jun
17
answered Prove that $(G, *)$ is abelian group, for $ x * y = \tan^{-1}(tan(x) + tan(y))$
Jun
11
answered Why is $2^{32}-1=(2+1)(2^2+1)(2^4+1)(2^8+1)(2^{16}+1)?$
Jun
11
answered Non-algebraic subfield intersection
Jun
8
answered Why do the equations $Ax + By + Cz= D$ represent planes in $\Bbb R^3$ and not lines?