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 Feb 1 answered How do we conclude that $f(x)=0, \forall x\in \mathbb{R}$ ? Dec 18 answered How to show that $Sp\{u+v-3w,2v-w,t+w,v+w\} = Sp\{u,v,w,t\}$ Nov 9 answered Prove the infinite union is not regular Nov 7 asked An exercise related to Krull topology - showing that two bases define the same topology Nov 6 asked Subgroups of Index $2$ of $(\mathbb{Z}_{2})^{\aleph_{0}}$ Nov 6 answered Prove that the Language $L= \{ 0^n1^m \;|\; n,m \ge 0 \}$ is regular Nov 2 asked Proving that $Gal(K^{\text{sep}}/K)=Aut_{K}(\tilde{K})$ Nov 2 asked Proving that $\mathbb{Q}^{\text{sol}}$ isn't hilbertiean Oct 31 asked Proving that the maximal abelian extension contains all abelian extensions Oct 31 asked Checking irreducibility of a polynomial in $\mathbb{K}[x,y]$ and PAC fields Oct 24 asked Power iteration- What are the conditions? Sep 28 answered Can a number be a subset of another set? Sep 20 answered Number of conjugates of an $m$-cycle $\sigma$ in $S_n$ Sep 4 answered A trick for calculating $n^6$ that I don't understand Sep 4 asked What is a good theoretical, yet somewhat practical, book about error correction codes? Aug 29 answered Finding the minimal polynomial of a linear operator Aug 19 answered Prove that $\lim _{x \to \infty} \sin x$ doesn't exist (using delta epsilon) Aug 18 answered G's order is a multiply of coprime numbers, need to prove about its subgroups. Aug 15 answered True or false. If A ∪ B = ∅ , then A = ∅ and B = ∅ . Aug 7 answered Showing irreducibility of a polynomial.