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I'm a student of mathematics in Germany.


Jun
8
awarded  Fanatic
May
31
answered If number of homomorphisms from $G \mapsto H$ is $n$. How many homomorphisms are there from $G \oplus G\cdot\cdot \cdot \oplus~ G ( s $ times) to $H$
May
31
comment If number of homomorphisms from $G \mapsto H$ is $n$. How many homomorphisms are there from $G \oplus G\cdot\cdot \cdot \oplus~ G ( s $ times) to $H$
Why and for which $Ψ$ do you have $|G/\operatorname{ker} Ψ| = n$?
May
21
comment Embeddings $A → B → A$, but $A \not\cong B$?
Thanks. What would you consider as structure preserving maps?
May
20
awarded  Nice Question
May
20
accepted Embeddings $A → B → A$, but $A \not\cong B$?
May
20
comment Embeddings $A → B → A$, but $A \not\cong B$?
Thanks! A very nice example! That’ll do.
May
20
asked Embeddings $A → B → A$, but $A \not\cong B$?
May
17
comment What is p-adic topology on $\Bbb Z$?
Define the $p$-adic topology.
May
13
comment If $|h_n'(0)|$ tends to 1 as n tends to $\infty$,does $h_n(0)$ tends to zero?Here $h_n$ is a sequence of analytic maps from D to D.
What if $h_n = \operatorname{id}_D + c$ for come $c ∈ ℂ$? Er, $h_n \colon D → D$. Nevermind. On the other hand, what do you mean by $D$?
May
9
comment To what math branches are these assignments related to
The answer would be $7!$.
May
9
comment Finding 1000th 5-smooth number
@Alessandro All of the prime factors of $1$ are in $2, 3, 5$.
May
8
comment How to find the jacobian of $x= \textrm{e}^{u}-\cos v$ and $ y= \textrm{e}^{u}+\sin v. $
I find your title super informative. = – ) (Also, read the homework-tag description, please.)
May
8
comment Prove the distributive law $a(b+c)=ab+ac$ for real numbers?
For what kind of objects $a$, $b$, $c$ do you want to prove this?
May
6
answered $f^2$ and $f^3$ are holomorphic implies $f$ is holomorphic.
May
4
comment Getting interested in mathematics again after I finished Computer Science program.
If you have time and money, enroll again. That’s (probably/in my view) the best way for learning mathematics. Category theory is hard to learn if you know little algebra and other mathematics, as category theory abstracts the constructions needed in many fields of theoretical mathematics. So much of it only becomes meaningful after learning about these constructions. (One should also mention that one really needs time to learn mathematics, so it might hard to work parallely.)
May
4
comment What is the derivation for the derivative of $a^{t}$
Is there an elementary proof for the first identity?
May
4
comment What is the derivation for the derivative of $a^{t}$
How do you justify your first and your third equation where you substitute “$a^t$” by “$\ln a^t$” and then “$t \ln a$” by “$e^{t \ln a}$”? (I’d just have jumped from the first term to the fourth with no intermediate steps using your argument below.)
May
4
comment Proof by induction that I'm stumped on.
Why is this downvoted thrice?
May
3
revised $G\times G\cong H\times H\Longrightarrow G\cong H$ for $G$ ACC and DCC
added 2 characters in body