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revised Intersections of fractal sets with connected sets
added 13 characters in body
Mar
30
asked Intersections of fractal sets with connected sets
Feb
18
comment Is a sufficiently nice simple curve which is nulhomotopic the boundary of a surface?
@MichaelWeiss yes, this is correct.
Feb
15
comment Is a sufficiently nice simple curve which is nulhomotopic the boundary of a surface?
@studiosus Do you have a reference?
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15
asked Is a sufficiently nice simple curve which is nulhomotopic the boundary of a surface?
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15
accepted Is a simple curve which is nulhomotopic the boundary of a surface?
Feb
15
comment Is a simple curve which is nulhomotopic the boundary of a surface?
@user99680 $U$ is an open subset of $\mathbb R^3$, so by invariance of domain it cannot be homeomorphic to $\mathbb R^2$.