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May
1
revised Is the intersection between a subgroup, and a normal subgroup, normal in the parent group?
edited tags
May
1
asked Eigenvalues of $I-A^{t}A$ where $A$ is a semi orthogonal matrix
May
1
comment Find the splitting field of $x^6-2x^3-1$ over $\mathbb{Q}$.
Splitting field over what base field ?
May
1
comment Evaluating $\lim\limits_{n\rightarrow \infty} \frac1{n^2}\ln \left( \frac{(n!)^n}{(0!1!2!…n!)^2} \right)$
Did you try to cancel out some of the terms ?
Apr
25
answered Topology without tears exercises 1.2 #6 i)
Apr
25
answered How to count algebraic multiplicities to show $\nexists$ an eigenbasis for $A$?
Apr
25
comment Is a pattern proof?
No, this [post][1] contains many examples [1]: math.stackexchange.com/questions/514/…
Apr
25
comment Prove that this set is open
@drhab - I think you should keep it, it can be interesting for future readers as it is a confusing matter
Apr
25
answered On convergent sequences
Apr
25
comment Prove that this set is open
@drhab - It is prove! If $X=\Pi_{i=1}^{n}\mathbb{R}$ one can consider two topologies on $X$ - The product topology and the topology induced by the metric on $\mathbb{R}^{p}$. I proved that $A$ was open without relying on the fact that the two topologies on $X$ are the same since I assumed the OP does not know that
Apr
25
answered Prove that this set is open
Apr
25
accepted Difference between definitions of $p$-subgroup and Sylow $p$-subgroup
Apr
24
asked Difference between definitions of $p$-subgroup and Sylow $p$-subgroup
Apr
24
comment Topology, maps, continuity
@smits - then $f^{-1}(U)$ is closed. This condition is equivalent for the continuity of $f$
Apr
24
answered Proving that $3^n<n!$ when $n\geq 7$
Apr
24
answered Where could (do?) we go after exhausting greek letters?
Apr
24
answered Eigen space of $T_{A}$ where $T_{A}(v)=Av$
Apr
24
answered Proving that if a set is both open and closed then it is equal to the real numbers
Apr
24
answered Classify $ \mathbb{Z}_9\times\mathbb{Z}_8\times\mathbb{Z}_8$/<(3,2,4)> according to the fundamental theorem of finitely generated abelian groups.
Apr
24
awarded  Notable Question