1,854 reputation
21137
bio website anhhuy.ch
location Switzerland
age 22
visits member for 4 years
seen 14 hours ago

My name is Anh Huy Truong and I am currently studying mathematics at the ETH Zürich.


Jul
30
awarded  Nice Question
Jul
25
accepted Differentiating terms involving evaluation operator and Wronski matrix
Jul
25
comment Differentiating terms involving evaluation operator and Wronski matrix
Why does $D\Phi^T(z) = \frac{\partial}{\partial y} \Phi^{T}y|_{y=z}$? Is this because $\Phi^T(z)$ does not depend on the time variable?
Jul
25
accepted What is an evaluation operator and what is its use?
Jul
25
asked Differentiating terms involving evaluation operator and Wronski matrix
Jul
22
awarded  Popular Question
Jul
3
accepted Construction of field extensions
Jul
3
comment Construction of field extensions
I see. The use of $X$ as both a variable and a polynomial caused the confusion.
Jul
3
comment Construction of field extensions
Just after submitting this question, it came to my mind that in the definition $a:=X+(P)$, the $X$ is probably not meant as a variable, but as the polynomial $X \in K[X]$, right?
Jul
3
asked Construction of field extensions
Jun
27
accepted Application of the Chinese Remainder Theorem
Jun
26
comment Application of the Chinese Remainder Theorem
Could you edit it into your original answer if it's not too much trouble? I'd appreciate that a lot. I'm not sure if I'm supposed to know it but it can't be any harm.
Jun
26
comment Application of the Chinese Remainder Theorem
What's the name of the simple algorithm you mention?
Jun
26
comment Application of the Chinese Remainder Theorem
Sorry for my lack of vocabulary, but what do you mean by "it is still onto"? That it is surjective?
Jun
26
asked Application of the Chinese Remainder Theorem
Jun
25
comment What is the orbit of a permutation?
As a starting help, can you explain why $\{1,3\}$ is an orbit of $\sigma$?
Jun
25
accepted What is the orbit of a permutation?
Jun
24
accepted Proving that every finite group with $|G| = pqr$ for $p,q,r$ distinct primes is solvable
Jun
24
asked Proving that every finite group with $|G| = pqr$ for $p,q,r$ distinct primes is solvable
Jun
24
comment What is the orbit of a permutation?
So it's the symmetric group acting on itself?