4,094 reputation
821
bio website shapetales.wordpress.com
location Prague, Czech Republic
age 28
visits member for 3 years, 8 months
seen yesterday

Math PhD. student and functional programming enthusiast.


Jun
2
answered Poincare dual of unit circle
Jan
14
answered How do I maximize $|t-e^z|$, for $z\in D$, the unit disk?
Jan
11
answered Field of fractions
Jan
8
answered Nets and Convergence: Why directed indices?
Jan
7
answered Proof of the correctness of Taylor series
Jan
7
answered The set of all sections of a vector bundle
Jan
7
answered Fundamental group of projective plane is $C_{2}$???
Jan
6
answered $V = W\oplus W^\perp$
Jan
5
answered Periodic solution of differential equation y′=f(y)
Jan
5
answered Mirror point with respect to Riemann circle (Möbius transformation)
Jan
4
answered How a group represents the passage of time?
Jan
4
answered Disprove that the group ring $\mathbb{Z}G(2)$ of $G(2)$ with coefficients $\mathbb{Z}$ is a principal ideal ring
Jan
4
answered The Hairy ball theorem and Möbius transformations
Jan
4
answered irrep of a non unit element in the finite group
Jan
3
answered “Proof” that $g(t) = (t,t,t,…)$ is not continuous with uniform topology
Dec
19
answered Find all positive integers $n$ s.t. $3^n + 5^n$ is divisible by $n^2 - 1$
Dec
18
answered How many degrees of freedom does a metric have on a psuedo-Riemannian manifold?
Dec
18
answered $\pi_n(SU(2)/Z_N)\simeq?$, $\pi_n(SO(3)/Z_N)\simeq?$, $\pi_n(U(1)/Z_N)\simeq?$
Dec
18
answered Aplanar covering of $S^1 \vee S^1$?
Dec
18
answered Are these functions isomorphisms of the first binary structure with the second? - Fraleigh p.34 3.13, 3.15