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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?