Mathematics
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Ruben's user avatar
Ruben
  • Member for 6 years, 4 months
  • Last seen more than 1 year ago
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All Questions Answers
Score Newest
answer
17
How to show $0 < \frac{x}{x+y} < 1$ given $0 < x$ and $0 < y$
Jul 2, 2019
answer
11
What is the Precise Definition of a “Complex Vector Space”?
Jul 12, 2019
answer
8
If $|a_0| < 1$, then the complex polynomial $z^n + a_{n-1}z^{n-1} + ... + a_1 z + a_0$ has at least one root in the unit disc.
Jul 1, 2019
answer
7
Proof that $\sqrt{2}$ is irrational is not convincing. Please help.
Jul 20, 2019
answer
6
Does the Grothendieck group of finitely generated modules form a commutative ring where the multiplication structure is induced from tensor product?
Jun 30, 2019
question
5
Is the inverse image exact on locally free sheaves?
Jul 12, 2019
answer
5
What is the probability that the i-th urn is empty?
Jun 22, 2019
answer
5
Problem 1.23 in Fulton's Algebraic curves
Jun 23, 2019
question
4
Do we have $\text{Proj} A[X] = \text{Spec} A$?
Jun 23, 2019
answer
4
$\int_0^1 \lfloor -x\rfloor \,dx$
Jul 20, 2019

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