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Studying maths in a higher semester.


2h
comment Limit of $\frac{1-\cos x}{\sin x}$
Welcome to Math.SE! Please take a look at math.stackexchange.com/help/notation to see how to use MathJax on this site.
2h
answered Limit of $\frac{1-\cos x}{\sin x}$
2h
revised Limit of $\frac{1-\cos x}{\sin x}$
added 30 characters in body
3h
revised What is the relation between $Irr(a, F)$ and $Irr(a, K)$?
added 8 characters in body; edited title
3h
answered Why does it stand that #$\mathbb{Z}_p(a)=p^n$?
3h
answered New measure constructed out of supremum of old measure
3h
comment New measure constructed out of supremum of old measure
@simon Nevermind, I oversaw the constraint $\mu_1(B) < \infty$ wich may lead to a different result if $\mu_1(A) = \infty$
4h
comment New measure constructed out of supremum of old measure
@simon Using $\sigma$-additivity of $\mu_1$ I think it has to be, or do you force $B$ to be a proper subset ($B \subsetneq A$)? In wich case $\mu_2$ is not a measure unless $\mathcal A$ contains no one-point sets...
4h
comment New measure constructed out of supremum of old measure
I fail to see why $\mu_2(A) \ne \mu_1(A)$.
16h
comment Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
@SimonS I've merged your edit with mine now and added some additional improvements so everything should be fine now.
16h
revised Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
Partial manuall rollback to incorporate SimonS' body edits.
1d
answered Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
1d
comment Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
@SimonS Never approve an edit if it changes the Title to MathJax-only. This is what the improve edit button is for.
1d
revised Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
rolled back to a previous revision
1d
comment Finding subspace's base
@Timbuc Wich is inverted by $R_2+2R_1$^^ Sorry for the misunderstanding.
1d
reviewed Edit suggested edit on Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
1d
revised Show that $\lim_{n\to ∞} |a_n| = |a|$ if $a_n\to a$
Edited title, improved formatting slightly
1d
comment Showing $\mathbf Q(\sqrt2,\mathrm i)=\mathbf Q( \sqrt2+\mathrm i)$.
@anoanoanoano If this solved your question, you should consider accepting it so it shows up as solved.
1d
comment Finding subspace's base
The matrix doesn't seem related to the question. Can you solve linear equations and check for linear independence?
1d
answered Finding subspace's base