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Diego Silvera
  • Member for 9 years, 9 months
  • Last seen more than a month ago
  • Montevideo, Uruguay
52 votes

Funny identities

18 votes

Contradiction! Any Symbol for?

7 votes

How to prove that if convex $A \subset \mathbb{R}^n$ and $A+A=A$ then $0 \in cl(A)$?

6 votes
Accepted

Finding limit of a function ($0$ appears in denominator)

4 votes

If $\sum_{n}A_n$ is convergent, then $\sum_{n} (-1)^{n} A_n$ is also convergent?

4 votes

Let $F$ be a field, $f(x)$ is a polynomial in $F[x]$. $E = F[x]/(f)$ is a field if and only if $f(x)$ is irreducible.

3 votes

Proof of the inequality $e^x-x>0$ for all $x\in \Bbb R.$

1 vote

What is the difference between a Subgroup and a subset?

1 vote

Showing that $X_n = 1 + \frac{1}{2} + \frac{1}{3} + \cdots + \frac{1}{n}$ is not bounded above.

1 vote

smoothness of multivariable functions

1 vote

What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)

0 votes

Every curve in $\mathbb{A}^3$ is the zero-locus of $3$ polynomials

0 votes

surjectivity and inverse of a function

0 votes

Rank of a Subgroup of a Free Abelian Group.

0 votes
Accepted

A set of Linear transformations

-7 votes
Accepted

If a continuous real function is additive, then it is linear