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Franco
  • Member for 9 years, 11 months
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25 votes
Accepted

Solving sin z = -z in reals

15 votes

How to prove the sheafification is a sheaf?

6 votes
Accepted

Does a diagonal matrix commute with every other matrix of the same size?

4 votes

Analysis: Prove the converse

3 votes
Accepted

The map $f\colon\mathbb{A}^2_k\to\mathbb{A}^2_k$ given by $f(x,y)=(x,xy)$ is birational?

2 votes
Accepted

Boundedness of a complex polynomial outside the unit circle

2 votes
Accepted

Dominant Rational Map

2 votes

Expected payout after rolling a dice three times and getting the highest roll

2 votes
Accepted

Basic question related to stalk of the structure sheaf of a scheme

2 votes

Transformation T is... "onto"?

2 votes

Show that if $A^3=0$ but $A^2\ne0$, then $A^2v=0$ has a nontrivial solution

2 votes

Base of a Subspace

1 vote
Accepted

Theorem: Euclidean space $\langle E;+\mid R\rangle$ is normed if $||x||=\sqrt{(x,x)}$ , $x\in E$.

1 vote

Exercise, measure theory

1 vote

Is $\int_{-\infty}^{\infty} \sin x \, \mathrm{dx}$ divergent or convergent?

1 vote

Normal extensions imply that intermediate extensions are normal

1 vote
Accepted

Pointwise/Uniform Convergence of a function

1 vote
Accepted

Basis with respect to which matrix is Similar

1 vote
Accepted

Problem with the concept of connection

1 vote
Accepted

Convergency of the power series at two points

1 vote
Accepted

Intersection of two parametric equations

1 vote
Accepted

Proof that triagonal matrices with distinct diagonal elements are similar

1 vote
Accepted

A simple function equals $0$

1 vote

Limits in matrix norm if convergence of integration is guaranteed

1 vote
Accepted

Checking whether a vector is in the span of a set of vectors

1 vote
Accepted

Linear Independence of Matrix Product

0 votes

Continuous functions which are Uniformly continuous

0 votes
Accepted

Identify this relation to be an injection, surjection, bijection or non-function

0 votes

branched covering factors through a primitive one

0 votes

Utility Theory: Risk Averse, which should I choose?