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21h
answered Quick way to determine existence of integral root of a polynomial in one variable
2d
comment List primitive elements of GF(2^3) = {0, 1, a, a^2,…, a^6}
what is your definition of primitive element?
Oct
18
comment Find the number of elements of order 3 in $S_7$
give me an element of $S_7$ that has order $3$...
Oct
17
comment How to prove that $\frac{x_n+1}{2x_n+1}\geq \frac{1}{\sqrt 2}$ if $x_0=1$
$\frac{x_n+1}{2x_n+3}\geq \frac{1}{\sqrt 2}\Rightarrow \sqrt{2}x_n+\sqrt{2}\geq 2x_n+3$ i.e., $\sqrt{2}-3\geq x_n(2-\sqrt{2})$ which is not quite good as $x_{n}\geq 0$ for all $n$... so, some thing is not quite correct with the question i guess..
Oct
17
comment Have to show that $q(x) \in$ $Z[x]$
I know what $\mathbb{Z}$ and $\mathbb{Q}$ are but i was not sure what $c(f) $ is... I did not understand your first line in second paragraph... why does there exists such $r,s$??
Oct
17
comment Fined the order of the following subgroup of $A_n$
May be you should first respond to the answers given to your other questions.. 8/12 of your questions are having no accepted answer...
Oct
17
comment Have to show that $q(x) \in$ $Z[x]$
I do not understand the question as it is.... please consider editing it...
Oct
17
comment Show $\alpha^m = \varepsilon$ working with permutation groups
what is $\varepsilon$? Identity element?
Oct
16
comment If $\cap_{j=1}^{n}I_{j} \subseteq P$ for any ideals $I_1,I_2,..I_n$, then $I_j \subseteq P$ for some $j$
@Panja : No it is not.... I was wrong!!
Oct
16
reviewed Close How to show that the limit of this sequence exists?
Oct
16
reviewed Leave Open Is Linear Algebra the foundation of Applied Mathematics?
Oct
16
comment Ideals of a field
Usually we consider left ideals... So, when you have written $a(a^{-1}b)$ they assume that you are considering $a^{-1}b\in I$ and $a\in R$... I guess that is the reason why that underline... But you are considering right ideal.. so what ever you have done is correct...
Oct
16
comment Power series in $\mathbb{Q}_5$
@evinda : Yes.... That also works...
Oct
15
comment Power series in $\mathbb{Q}_5$
That is definition...
Oct
15
comment Power series in $\mathbb{Q}_5$
Yes....!!!!!!!!
Oct
15
comment Power series in $\mathbb{Q}_5$
Oh... Yes.. Now i got your question.. See that we have seen that $|\frac{1}{2}|_5=1$... These are what we consider as integers.. p adic numbers for which "norm" is less than or equal to $1$..
Oct
15
comment Power series in $\mathbb{Q}_5$
Oh... I guess he wants to see if "coefficients" of expansion of $\frac{1}{2}$ are integers... So, If that is the case then you have "showed" that it is in fact an integer...
Oct
15
comment Power series in $\mathbb{Q}_5$
There is nothing like "showing" something is $5$ adic... I am writing something as a $5$ adic expansion...
Oct
15
comment Power series in $\mathbb{Q}_5$
No No No... there is nothing like showing something is $5$ adic.... You are writing $5$ adic expansion...
Oct
15
comment Power series in $\mathbb{Q}_5$
Your question is not so clear... do you mind to make it a bit more clear?