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Sep
17
awarded  Popular Question
Sep
15
comment Proving that: 800 + n log n + 200√ n log n = Θ(n log n)
You may like a little tool I made, to quickly find and type those symbols: kasperpeulen.github.io/PressAndHold/index.html
Sep
15
comment Proving that: 800 + n log n + 200√ n log n = Θ(n log n)
meta.math.stackexchange.com/questions/5020/… for information how to typeset math formulas here
Sep
14
revised Find domain of the function $f(x)= (x^3+3x^2-4x)^{-1/4}$
added 2 characters in body; edited title
Sep
10
revised Show that if $V$ is an irreducible finite dim. representation of $A$, then $z \in Z(A)$ acts in $V$ by multiplication by some scalar $\chi_V(v)$.
edited body
Sep
10
accepted Show that if $V$ is an irreducible finite dim. representation of $A$, then $z \in Z(A)$ acts in $V$ by multiplication by some scalar $\chi_V(v)$.
Sep
10
accepted What is wrong in this proof where I show that $\text{End}_k(k^2)$ is a division ring?
Sep
10
comment What is wrong in this proof where I show that $\text{End}_k(k^2)$ is a division ring?
I get it thanks !
Sep
10
comment What is wrong in this proof where I show that $\text{End}_k(k^2)$ is a division ring?
So $AR$ is not a two sided ideal ?
Sep
10
asked What is wrong in this proof where I show that $\text{End}_k(k^2)$ is a division ring?
Sep
10
asked Show that if $V$ is an irreducible finite dim. representation of $A$, then $z \in Z(A)$ acts in $V$ by multiplication by some scalar $\chi_V(v)$.
Sep
7
accepted Show that the homomorphism $\lambda: k[X] \to End_k(V) : p \mapsto p(A)$ corresponding to the $k[X]$-module strucutre of $V$ has a nontrivial kernel.
Sep
7
asked Show that the homomorphism $\lambda: k[X] \to End_k(V) : p \mapsto p(A)$ corresponding to the $k[X]$-module strucutre of $V$ has a nontrivial kernel.
Sep
6
awarded  Popular Question
Sep
5
asked Why does Euclid write “Prime numbers are more than any assigned multitude of prime numbers.”
Jul
18
comment Why is this definition of complex numbers “informal”?
So why is what I say close to formal, but not exactly formal ?
Jul
18
asked Why is this definition of complex numbers “informal”?
Jul
7
comment How to make a perpendicular construction in 3 moves?
@JiK I'm fine with it if you want to post another hint.
Jul
7
revised How to make a perpendicular construction in 3 moves?
added 97 characters in body
Jul
7
answered How to make a perpendicular construction in 3 moves?