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user173856
  • Member for 9 years, 10 months
  • Last seen more than 5 years ago
39 votes
5 answers
2k views

Is every path with this property shorter than another path with the same endpoints?

15 votes
2 answers
1k views

A question about certain sets of permutations of the ordered pairs $(1,1),(1,2),\cdots,(1,n),\cdots,(n,1),(n,2),\cdots,(n,n)$

13 votes
0 answers
496 views

Is it possible that the following integral is $0$?

12 votes
1 answer
444 views

An interesting inequality

10 votes
2 answers
377 views

a question about connected open sets in $R^2$

8 votes
1 answer
452 views

An interesting integration

8 votes
1 answer
491 views

The anti-symmetrization of a kind of polynomials in $\mathbb{Z}[x_1,x_2,\ldots,x_n]$

7 votes
1 answer
245 views

The determinant of a $4\times4$ matrix associated to some specific polynomial as follow

7 votes
4 answers
512 views

The coefficient of a specific monomial of the following polynomial

6 votes
2 answers
525 views

A question about homogenous polynomials of degree $\frac{n(n-1)}{2}$

6 votes
2 answers
307 views

The coefficient of a specific monomial in the expansion of the following polynomial

6 votes
1 answer
740 views

Is the following integral nonzero?

5 votes
1 answer
201 views

A decomposition of $w_0$ which is similar to the reduced decomposition

5 votes
0 answers
133 views

Expectation of a specific random variable on the probability space of $n\times n$ matrices over $\{0,1\}$

5 votes
2 answers
189 views

another question about connected open sets in $R^2$

5 votes
1 answer
148 views

For what graph does the following algebraic property hold?

4 votes
1 answer
265 views

A partition of the set of all $n\times n\ (0,1)$-matrices

4 votes
1 answer
341 views

Two similar integrals

4 votes
1 answer
270 views

The class of $(-1,0,1)$-matrices with all row sums and column sums equal to $0$

4 votes
0 answers
261 views

Is the following integral positive or not?

4 votes
0 answers
207 views

An operator derived from the divided difference operator $\partial_{w_0}$

4 votes
1 answer
393 views

A question about minimal graph of diameter $2$

3 votes
0 answers
110 views

When does the constant term in the following expansion is nonzero?

3 votes
1 answer
169 views

The sign of the following integral

3 votes
1 answer
137 views

A question about prime elements in a specific integral domain

3 votes
1 answer
432 views

the existence of a real polynomial satisfying the following property

3 votes
0 answers
80 views

Searching a specific matrix whose determinant is a product which is similar to the Vandermonde determinant

3 votes
1 answer
553 views

Does there exist a Lebesgue nonmeasurable set $E$ in $\mathbb{R}$ satisfies that $E\cap A$ is a Borel null set for every Borel null set $A$?

3 votes
1 answer
117 views

How many $2d$-elements subsets with specific property at most can we choose from $\{1,2,\cdots,n\}$

2 votes
2 answers
259 views

An inner product on the vector space $\mathbb{R}[x_1,\cdots,x_n]_m$