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Sep
24
comment Why consider neighbourhood containing an open set?
Are you asking about the source of the terminology or about proving that a neighbourhood of some point x is open ?
Sep
20
comment Doing extended synthetic division with more than 2 terms
google.co.il/…
Sep
20
answered Number of conjugates of an $m$-cycle $\sigma$ in $S_n$
Sep
20
comment Number of conjugates of an $m$-cycle $\sigma$ in $S_n$
But what is $m$ ?
Sep
4
comment A trick for calculating $n^6$ that I don't understand
And if anyone knows how to fix this spacing of the \mod..
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
30
comment Can 720! be written as the difference of two positive integer powers of 3?
Thanks for the explanation. This was a really nice solution!
Aug
30
comment Can 720! be written as the difference of two positive integer powers of 3?
Can you please explain the first congruence? I don't see where the $2^k$ came from
Aug
29
answered Finding the minimal polynomial of a linear operator
Aug
28
comment Is it possible to embed $\mathbb Z^n$ inside $ \mathbb Z^m$ as a $\mathbb Z$-module for $m < n$?
What exactly do you mean by linearly independent where we arn't talking about vector spaces ?
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
12
comment Mental Calculations
And given that the answer was probably an integer given the nature of the question, this really solved it the way I see it
Aug
10
comment Geometric or at least application view of a group with 3 elements?
How about rotation by 120 degrees?
Aug
7
answered Showing irreducibility of a polynomial.
Aug
7
comment $\sum_{n=1}^\infty a_n = \sum_{n=1}^\infty n a_n$ possible?
This assumes that the series is a positive series?
Jul
26
comment How is the Fourier transform a geneeralization the the Fourier series?
@Mitsos - seems that I forgot the $n$, should be ok now
Jul
26
revised How is the Fourier transform a geneeralization the the Fourier series?
edited body