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espen180

Norway

Age: 21

I'm a 3rd year bachelor student of mathematics and physics.

My interests include topology, geometry and mathematical physics.

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Top Questions

Is every contractible space a cone?

general-topology algebraic-topology examples-counterexamples asked Jan 16 at 0:09

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A theorem due to Gelfand and Kolmogorov

general-topology functional-analysis commutative-algebra ring-theory compactness asked Nov 1 '12 at 12:00

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Example of a pair of non-cobordant manifolds

algebraic-topology differential-topology examples-counterexamples asked Jan 22 at 18:11

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Top Answers

What's a proof that the angles of a triangle add up to 180°?

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Finding a homeomorphism $\mathbb{R} \times S^1 \to \mathbb{R}^2 \setminus \{(0,0)\}$

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Is there any abstract theory of electrical networks?

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