general topology : Math Help

D={1/n :n element of N} subset of R..find the interior ,derived set,closure,boundary of D.

general-topology
Updated September 16, 2019 06:20 AM

dense set without intersecting all of th dense set

general-topology
Updated September 16, 2019 05:20 AM

Definition of Exterior Power in Rotman

algebraic-topology differential-forms exterior-algebra
Updated September 16, 2019 04:20 AM

How to show that a set-valued function is lower semicontinuous?

real-analysis general-topology set-valued-analysis
Updated September 16, 2019 00:20 AM

Order of $GL(2, \mathbb{Z}_4)$

group-theory general-linear-group
Updated September 15, 2019 23:20 PM

Distance between a point and the diagonal set.

real-analysis general-topology metric-spaces
Updated September 15, 2019 19:20 PM

Show that $B_{\rho}((0,0),1)=\{(x,y)\in\mathbb{R}^2:\, \max\{|x|,|y|\}<1\}$

real-analysis general-topology metric-spaces
Updated September 15, 2019 19:20 PM

If $f$ is a closed path in $S^1$ at $1$, then $\deg (f^m) = m \deg(f)$

algebraic-topology proof-explanation fundamental-groups
Updated September 15, 2019 16:20 PM

Description for component preserving Subgroup

knot-theory low-dimensional-topology braid-groups
Updated September 15, 2019 15:20 PM

$\mathbb{R^n}$ with maximum metric is connected.

real-analysis general-topology metric-spaces connectedness
Updated September 15, 2019 14:20 PM

Proving that between any 2 real numbers there is a compact set.

general-topology compactness
Updated September 15, 2019 13:20 PM

Visualizing the elements of this basis:

general-topology
Updated September 15, 2019 11:20 AM

What is simply ordered set and order topology?

general-topology
Updated September 15, 2019 10:20 AM

$X$ is connected iff there is no continuous surjection $X \rightarrow\{0,1\}$

general-topology continuity connectedness
Updated September 15, 2019 10:20 AM

Is it true that the image of a perfect set is perfect under a continuous map?

general-topology continuity
Updated September 15, 2019 09:20 AM

homotopy between $\mathbb{R}$ and a discrete space

general-topology algebraic-topology
Updated September 15, 2019 09:20 AM

Is a Radon measure with discrete support a sum of Dirac measures?

general-topology measure-theory
Updated September 15, 2019 07:20 AM

Why the interior of $\mathbb{Q}$ in $\mathbb{R}$ is empty?

calculus general-topology metric-spaces
Updated September 14, 2019 23:20 PM

Find an example to explain that $f^{-1}(\mathcal{B}_{Y})\neq \mathcal{B}_{X}$

real-analysis general-topology measure-theory
Updated September 14, 2019 23:20 PM

A homeomorphism maps neighborhoods to neighborhoods

general-topology proof-verification continuity metric-spaces
Updated September 14, 2019 22:20 PM

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