Boundary of unit sphere
99678
Is a sphere a closed set?
69235
padded boundary of convex hull
80100
Boundary of product manifolds such as $S^2 \times \mathbb R$
70082
Show: Quotient space is homeomorphic to unit sphere
32555
Prove: The weak closure of the unit sphere is the unit ball.
54957
The necessary and sufficient condition for a unit element in Euclidean Domain
41651
Volume bounded by a sphere of radius $1$ in 4 dimensions
31980
Is the boundary of a boundary a subset of the boundary?
81748
Arc length parameterization lying on a sphere
60053
Does the boundary of an open set have measure zero (in $\mathbb{R}^n$)?
64993
Connectedness of the $S^2$ sphere
35751
Is There a Problem with This Professor's Proof Concerning Interior and Boundary Points?
93312
Fourier transform of the indicator of the unit ball
50731
Isometries of the sphere $\mathbb{S}^{n}$
44194
How to show that the unit sphere is a topological manifold?
106420
Integral around unit sphere of inner product
133465
Stokes and Gauss' Divergence theorem on a closed smooth surface in $\Bbb R^3$