List questions from alternative-proof

Published on 21 Jun 2014 - 4:15

237

Views

${n \choose r}=\frac {n!}{r!(n-r)!}$ without using the permutation approach.

Published on 21 Jun 2014 - 16:34

290

Views

Epic-monic factorisation in $\mathbf{Set}$.

Published on 23 Jun 2014 - 12:11

225

Views

$x^{1+\epsilon}$ is not uniformly continuous on $[0,\infty)$

Published on 28 Mar 2026 - 9:55

62

Views

Different approaches for this problem (number in different bases)

Published on 26 Jun 2014 - 20:46

9.8k

Views

$ABC=I\implies B$ is invertible and $B^{-1} = CA$

Published on 28 Jun 2014 - 17:41

68

Views

The number of holomorphic coverings (with given degree) of the punctured sphere is finite.

Published on 26 Mar 2026 - 19:20

224

Views

Ratio of 2 Gammas, approximation with power

Published on 04 Jul 2014 - 5:00

449

Views

All $k$-regular subgraphs of $K_{n,n}$ have a perfect matching: a proof without Hall's Marriage Theorem?

Published on 25 Mar 2026 - 7:46

142

Views

If $I_{n+1}\subset I_n$, show that $\bigcap_{n=1}^\infty I_n$ is nonempty

Published on 09 Jul 2014 - 21:51

576

Views

Proof about AM-GM inequality generalized

Published on 26 Mar 2026 - 22:51

130

Views

Check proof please

Published on 15 Jul 2014 - 21:58

1.6k

Views

How to prove Post's Theorem by induction?

Published on 18 Jul 2014 - 19:41

1.3k

Views

Elementary theorems with several proofs?

Published on 20 Jul 2014 - 8:39

2.4k

Views

Is there any theorem about figures of equal area and perimeter being congruent?

Published on 24 Jul 2014 - 20:50

List Question

Proof that doesn't exists a rational $s$ such that $s^2 = 6$

${n \choose r}=\frac {n!}{r!(n-r)!}$ without using the permutation approach.

Epic-monic factorisation in $\mathbf{Set}$.

$x^{1+\epsilon}$ is not uniformly continuous on $[0,\infty)$

Different approaches for this problem (number in different bases)

$ABC=I\implies B$ is invertible and $B^{-1} = CA$

The number of holomorphic coverings (with given degree) of the punctured sphere is finite.

Ratio of 2 Gammas, approximation with power

All $k$-regular subgraphs of $K_{n,n}$ have a perfect matching: a proof without Hall's Marriage Theorem?

If $I_{n+1}\subset I_n$, show that $\bigcap_{n=1}^\infty I_n$ is nonempty

Proof about AM-GM inequality generalized

Check proof please

How to prove Post's Theorem by induction?

Elementary theorems with several proofs?

Is there any theorem about figures of equal area and perimeter being congruent?

Trending Questions

Popular # Hahtags

Popular Questions