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  1. abstract algebra - $K$ is a splitting field $\iff$ any irreducible ...

    Let $K/F$ be a finite extension. I want to show that $K$ is a splitting field over $F$ $\iff$ any irreducible polynomial $p (x)\in F [x]$ that has a root in $K ...

  2. abstract algebra - If $G/Z (G)$ is cyclic, then $G$ is abelian ...

    @Robert: Yes, I think so. Where did the negative exponent come from? Would you want to make this comment a formal "answer"?

  3. radicals - Is there a way to check if an integer is a square ...

    Nov 11, 2019 · Is there a way to check if a number is square number? For example, we know that $4$ is a square number because $2^2=2$ and $9$ is a square number because $3^2=9$. But for example …

  4. Integrated Circuit: Definition, Formula, Derivation and Examples - Toppr

    An integrated circuit refers to a chip that contains various interconnected multiple electronic components. Furthermore, the location of this chip is on a semiconductor material and it contains …

  5. If $φ:I→J$ is a homeomorphism then $f_n→f$ implies that $ (f_n∘φ) → …

    Jan 8, 2022 · If $φ:I→J$ is a homeomorphism then $f_n→f$ implies that $ (f_n∘φ) → (f∘φ)$ with respect the uniform, pointwise and $L_2$ topology respectively?

  6. If $f$ and $g$ are surjective, then $g (f (x))$ is surjective

    Sep 25, 2016 · What part of the proof are you having trouble understanding? In my reading, the image you posted contains a complete and detailed proof directly from the definition of surjective.

  7. Mutually Singular measures - Mathematics Stack Exchange

    (ii) $\int_Ig_ndm=1$ for all $n$, (iii) $\lim_ {n\to\infty}\int_Ifg_ndm=\int_Ifd\mu$ for every $f\in C (I)$. Does it follow that the measures $\mu$ and $m$ are mutually singular? I know that $\mu$ and $m$ …

  8. discrete mathematics - Is "empty set" an element of a set ...

    Sep 13, 2023 · The empty set is a subset of every set including itself, but it is not necessarily an element of any particular set.

  9. Show that if $g \circ f$ is injective, then so is $f$.

    May 10, 2015 · @:G. Sassatelli ,here is my approach for part b)please correct me if i am wrong $\text {Assume that }\,\, x\epsilon X\,,y\epsilon Y\,,z\epsilon Z\,\,. \text {As}\, g ...

  10. If x is rational, $x\ne 0$, and $y$ irrational, prove $x+y, x-y, xy, x ...

    Please provide additional context, which ideally explains why the question is relevant to you and our community. Some forms of context include: background and motivation, relevant definitions, source, …