Mathematics
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George
  • Member for 8 years, 2 months
  • Last seen more than a month ago
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15
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88
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6
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7
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7
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4
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24
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23
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10
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10
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7
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7
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12
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9
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9
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All Questions Answers
Score Newest
question
20
Why is surjectivity "harder" than injectivity?
Apr 15, 2020
answer
11
Determine a matrix knowing its eigenvalues and eigenvectors
Jan 26, 2015
question
7
Show if an abelian group $G$ has a $\mathbb Q$-vector space structure, then it is unique.
Sep 20, 2017
question
7
Show that $\dim_k(\mathfrak m^n / \mathfrak m^{n+1})=n+1$ whenever $0\leq n<m_P$, where $(\mathcal O,\mathfrak m)$ is the local ring of $P$
Sep 22, 2018
question
6
For a finitely generated ideal $I$, $I^2=I$ implies $A/I$ is flat over $A$ or $I$ is principal with an idempotent
Mar 12, 2019
question
5
A projective ideal in an integral domain is finitely generated
Apr 26, 2019
question
5
The cohomology ring of an oriented closed $3$-manifold with $\pi_1=\mathbb Z$
May 6, 2019
question
5
Find all solutions to $x^2+54=y^3$ over the integers
Apr 11, 2017
question
5
The quotient space $S^3/S^1$ is homeomorphic to $S^2$
May 1, 2017
question
4
How is it geometrically justified that the tangent space to $y(y-x^2)=0$ is the whole plane?
Feb 19, 2019

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