Lubin
Reputation
25,629
Next tag badge:
99/100 score
32/20 answers
Badges
2 25 56
Newest
Impact
~333k people reached

• 1 helpful flag
• 2,582 votes cast

# 832 Posts

 Apr 28 answered Expand the Laurent series Apr 26 answered Find $\theta \neq \sqrt{3}+\sqrt{5}$ such that $\mathbb{Q}(\theta) = \mathbb{Q}(\sqrt{3},\sqrt{5})$. Need a hint to get started. Apr 24 answered Extensions of the quadratic closure of $\mathbb{Q}$ Apr 24 answered describe explicitly all the ideals of $R/(f(x))$ Apr 20 answered The irreducibility of $X^q - 3$ in the field extension $\mathbb{Q}(\zeta_q, 2^{1/q})$ Apr 19 answered Splitting field of an irreducible polynomial of degree four Apr 17 answered If $a \in \mathbb{Z}_5$ and $a \equiv \pm1 \text{ }(\text{mod }5)$, does there exist $x \in \mathbb{Z}_5$ where $x^2 = a$? Apr 16 answered How to determine the residues of $\frac{z}{\sinh(kz)}$? Apr 14 answered Please express the first 3 7-adic digits of a root of $x^3-1$ in $\mathbb{Z}_7$ other than 1. Apr 14 answered Find $[\mathbb{Q(\alpha)}: \mathbb{Q}]$ where $\alpha=\zeta+\zeta^3+\zeta^4+\zeta^5+\zeta^9$ Apr 13 answered Numbers in $\mathbb{Q}_p$ can be written uniquely as $\sum_{i=k}^\infty \alpha_i p_i$ Apr 13 answered Bézout's Identity of polynomials? Apr 13 answered Formula for calculating the $α$ and $β$ in $gcd(a, b) = αa + βb$ Apr 11 answered Galois extentions Apr 11 answered Finding last 2 digits of $2016^{500}$ without repeated squaring Apr 10 answered How to find $W^{\perp}$ in the following polynomial inner product space? Apr 6 answered Are Euclidean domains exactly the ones which we can define “mod” on? Apr 6 answered Find a prime $p>5$ such that $x^2 +1$ is reducible in $\mathbb Z_p[x]$ Apr 3 answered How many fields are there between $\mathbb{Q}$ and $\mathbb{Q}(\zeta_{15})$? Apr 2 answered Splitting fields being Galois