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I'm a student of mathematics in Germany.


Jan
22
answered $f(x) \in R[X]$ irreducible $\Rightarrow (f(x))$ ideal?
Jan
21
answered $\mathbb{A}^n$ with the Zariski Topology is Quasi-Compact.
Jan
19
answered Question about cyclic subgroup of a non-abelian group of order $8$.
Jan
18
answered is complex number under absolute value a group?
Jan
18
answered $A\subset f^{-1}(f(A))$ with equality if and only $f$ is injective.
Jan
18
asked Introducing $\mathrm π$ and polar coordinates in real analysis
Jan
17
answered My proof that $G(x)\to G / G_x$ is injective
Jan
16
answered Ideal contained in annihilator problem
Jan
11
answered Schwarz reflection over $S(0,1)$
Jan
11
answered The pushout of an open/closed injective map is open/closed
Jan
10
answered Application of the mean value theorem to find $\lim_{n\to\infty} n(1 - \cos(1/n))$
Jan
10
answered Proving this function is an open map
Jan
10
asked The pushout of an open/closed injective map is open/closed
Jan
9
asked Eilenberg–Steenrod axioms for homology without pairs of spaces
Jan
6
asked Surjectivity of the complex exponential without using $π$
Jan
5
answered Exact sequence and homology isomorphisms
Jan
2
answered a short theorem about poles
Jan
2
answered Proof that all numbers between $0$ and $1$ lie between $1/(n+1)$ and $1/n$ for some natural number $n$
Jan
2
answered If $f:\mathbb{C}\to\mathbb{C}$ is Entire and $\vert f \vert\le A+B\vert z \vert^{3/2}$, then $f$ is Linear
Jan
1
answered Recursion with generating function.