pivoxa15
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Homework Statement
What is the boundary of a torus?
What is the boundary of a sphere?
The Attempt at a Solution
Both 0?
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What is the boundary of a torus?
What is the boundary of a sphere?
Both 0?
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Neither of them is 0. In both cases it is a symbol that looks like 0 I suppose. Why don't you start with the defintions, since many things are clearly implied by them?
pivoxa15
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It is not the null set is it?
THe boundary must be a 1-manifold?
THe boundary must be a 1-manifold?
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