Mathematics
Nash's user avatar
Nash's user avatar
Nash's user avatar
Nash
  • Member for 6 years, 4 months
  • Last seen more than a month ago
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117
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All Questions Answers
Score Newest
question
7
Let $X=\mathbb{D}^2/\sim$, where $(\cos(\theta),\sin(\theta))\sim(\cos(\theta+\frac{2\pi}{3}),\sin(\theta+\frac{2\pi}{3}))$, $\theta\in \mathbb{R}$
Jun 24, 2019
question
5
The succession of the coefficient theorem is split but not naturally
Aug 20, 2019
question
4
Show the quotient space of a finite collection of disjoint 2 simplices obtained by identifying pairs of edges is always a surface, locally homeomorp
Jul 13, 2019
question
4
Show that the ring of polynomials with coefficients in a field, and in infinitely many variables, is not Noetherian
Aug 21, 2018
question
4
Using taylor series expansion to approximate the derivative of a function
May 21, 2018
question
4
Find the universal covering of $\mathbb{R}P^2\vee\mathbb{R}P^2$
Apr 30, 2018
question
4
Suppose that $q: X\to Z$ and that $p: X\to Y$ are covering spaces. Suppose there is a continuous function $r: Y\to Z$ such that $r\circ p=q$.
Apr 8, 2018
question
4
$f_n:C_n\to D_n$ is injective for all $n\in\mathbb{Z}$ but $f_*:H_n(C_*)\to H_n(D_*)$ is not injective for some $n\in \mathbb{Z}$.
May 16, 2019
question
4
$\mathbb{C}$ is isomorphic to $\bar{\mathbb{Q}}$?
Sep 21, 2017
question
3
Let $f: \mathbb{R}^3\to \mathbb{R}^3$ be given by $f(\rho, \phi, \theta) = (\rho\cos\theta \sin \phi, \rho \sin \theta \sin \phi, \rho \cos \phi).$
Jan 3, 2018

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