Dair
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 Feb 11 accepted Proving trefoil group is isomorphic to a fundamental group. Oct 29 accepted How can I manipulate this substitution of variables? Sep 24 accepted Dot product of two vectors with respect to their sum and difference. May 10 accepted Need help determining what this center is isomorphic to May 8 accepted Help show the following isomorphism cannot exist. May 4 accepted Finding an ideal such that $\mathbb{Z}[x]/I \cong \mathbb{Z}[i]$. Mar 20 accepted Can I use Burnside's Theorem? Or should I take a different approach for this proof? Mar 19 accepted How do you apply an element on the left of a permutation? Mar 19 accepted What about my proof is “nonsense”? Mar 14 accepted How should I continue my proof of this cycle property? (And did I make a mistake?) Feb 13 accepted Prove $\mathbb{Z} \times \mathbb{Z} / \left\langle (6,9)\right\rangle$ has an element of order 3 Feb 9 accepted Trouble showing the addition of the fractional parts are a group. Sep 4 accepted Is this a valid proof technique regarding the divisibility of numbers? Sep 1 accepted Prove $\alpha \in\mathbb R$ is irrational, when $\cos(\alpha \pi) = \frac{1}{3}$ Sep 1 accepted May I have a hint for this gcd problem? Aug 30 accepted Question about proof of Cauchy-Schwarz inequality. Jun 27 accepted What do I not understand about one-to-one functions? Jun 3 accepted Was my reasoning correct for this? May 14 accepted Need help showing my example does (or doesn't) work. May 5 accepted Am I on the right track? Any hints on what to do next?