This account is temporarily suspended network-wide. The suspension period ends on Sep 22 at 19:09.
user avatar
user avatar
user avatar
NNOX Apps
  • Member for 9 years, 7 months
  • Last seen more than a month ago
28 votes

How can I prove $\sup(A+B)=\sup A+\sup B$ if $A+B=\{a+b\mid a\in A, b\in B\}$

17 votes

Math and mental fatigue

16 votes

How to define a bijection between $(0,1)$ and $(0,1]$?

13 votes

Union of two vector subspaces not a subspace?

7 votes

Cardinality of the set of all real functions of real variable

6 votes

Is there any difference between mapping and function?

5 votes

How can I prove $\sup(A+B)=\sup A+\sup B$ if $A+B=\{a+b\mid a\in A, b\in B\}$

5 votes

What is the integral of 0?

5 votes

More examples of Simpson's Paradox, barring the ones on Wikipedia, Titanic, and delayed flights.

5 votes

Abductive vs. inductive reasoning

5 votes

Understanding the P-value

4 votes

Is a bijective map between two groups always an isomorphism?

4 votes

Why does L'Hôpital's rule work?

4 votes

Do the real numbers and the complex numbers have the same cardinality?

4 votes
Accepted

Why is the universal quantifier $\forall x \in A : P(x)$ defined as $\forall x (x \in A \implies P(x))$ using an implication?

4 votes

Image of subgroup and Kernel of homomorphism form subgroups

4 votes

Which do you recommend for learning how to write proofs — How to Prove it by Velleman, or How to Solve it by Polya?

3 votes

Which do you recommend for learning how to write proofs — How to Prove it by Velleman, or How to Solve it by Polya?

3 votes

$H$ is a maximal normal subgroup of $G$ if and only if $G/H$ is simple.

3 votes

Prove $\sup(f+g) \le \sup f + \sup g$

3 votes

Is "integrability" equivalent to "having antiderivative"?

3 votes

If $A^2+2A+I_n=O_n$ then $A$ is invertible

3 votes

Why is negative times negative = positive?

3 votes

What is a good way to think of Factor Groups?

3 votes

What is the difference between an indefinite integral and an antiderivative?

3 votes

Typo in Spivak's explanation of limits in Calculus?

2 votes

Intuitively, why does Bayes' theorem work?

2 votes

Bounded sequence and every convergent subsequence converges to L

2 votes

What is the difference between an indefinite integral and an antiderivative?

2 votes

More examples of Simpson's Paradox, barring the ones on Wikipedia, Titanic, and delayed flights.

1
2 3 4 5 6