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### Questions (90)

 12 A formula for the power sums: $1^n+2^n+\dotsc +k^n=\,$? 9 $\mathbb{Z}[X]/(X^2-1)$ is not isomorphic with $\mathbb{Z}\times \mathbb{Z}$ 7 1 to the power i [duplicate] 6 Minimal polynomial of $\alpha^2$ given the minimal polynomial of $\alpha$ 6 Number of unitary homomorphisms $\phi \ : \ \mathbb{Z}[X]/(X^3+3X+5) \longrightarrow \mathbb{R}$

### Reputation (841)

 +10 Find the probability distribution, knowing the conditional probability distribution. +5 prove that $\langle S \rangle$ is the intersection of all subgroups containing $S$ +5 A formula for the power sums: $1^n+2^n+\dotsc +k^n=\,$? +5 Special integrals

 3 Show that an extension is separable 2 If $V$ is a $\mathbb CG$-module then we may take $\rho(g)$ as a diagonal matrix? 1 General solution of $\frac{d^{2}u}{d\rho^{2}}=\frac{l\left(l+1\right)}{\rho^{2}}u$

### Tags (69)

 5 abstract-algebra × 26 1 quantum-mechanics 3 field-theory × 7 0 ring-theory × 18 3 extension-field × 4 0 polynomials × 9 2 representation-theory × 6 0 probability × 8 1 differential-equations × 2 0 real-analysis × 7

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 Mathematics 841 rep 419 Physics 141 rep 14 Stack Overflow 140 rep 17 Ask Ubuntu 101 rep