Ben Steffan

Member for 4 years, 3 months
Last seen more than 2 years ago

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algebraic-topology

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3

Euler characteristic of projective plane (rank$(H_1(\mathbb{R}P^2))=$ rank$(Z_2)=0?$)

Feb 9, 2020

3

Some confusion regarding a quotient space: what is the space $\mathbb{S}^1\times I/ \mathbb{S}^1\times \{1\}$?

May 23, 2020

2

Invertibility of elements in $A[x]$ with coefficients in the Jacobson radical

May 4, 2020

2

Homology of spheres: how to show that $\tilde{H}_{n-1}(S^{n-1})\cong\tilde{H}_{n}(S^{n})$, without Mayer Vietoris

Feb 28, 2020

2

Brouwer's theorem proof using Category theory

Mar 20, 2020

Questions

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7

Invertibility of elements in $A[x]$ with coefficients in the Jacobson radical

May 4, 2020

2

Fundamental group of the complement of $k$ points in $\mathbb{R}^2$

Jun 12, 2019

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