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I'm a student of mathematics in Germany.


1d
comment Are there any well known mathematicians who published very little?
I don’t know how much Hermann Grassmann published, but he might be a candidate: I believe he is only known for his Lineare Ausdehnungslehre in which he conceived of linear and multilinear algebra (including the exterior product).
Jul
2
awarded  Curious
Jul
1
comment How to proof (using by mathematical induction)($n\in \mathbb{N}$)
@user159813 $\frac 1 n \overset{n → ∞} \longrightarrow 0$, but $\frac 1 n > 0$, so $0 > 0$?
Jun
30
comment If $AB = I$ then $BA = I$: is my proof right?
It’s not correct – see Thomas’ comment. And @agha: I think she or he is more interested in finding an own proof.
Jun
29
comment Is there anything behind the “$m + N$” notation for elements in the factor structure $M/N$?
@AndreasCaranti Okay, thank you. So do you know whether there’s anything behind this notation or do you know of any alternative notations?
Jun
29
comment Is there anything behind the “$m + N$” notation for elements in the factor structure $M/N$?
@AndreasCaranti No, not particularly. It only tells me that the partition of $M$ into $N$-cosets in $M$ is a realization of the factor structure $M/N$. Okay, this can be very useful from time to time – but most of the time, it’s not what I need, so why should I accent it through my notation?
Jun
29
asked Is there anything behind the “$m + N$” notation for elements in the factor structure $M/N$?
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.)