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Litho's user avatar
Litho's user avatar
Litho
  • Member for 9 years, 6 months
  • Last seen this week
17 votes

How can one create random numbers with special correlations?

10 votes
Accepted

Is there a bijection of the natural numbers which swaps $\frac{1}{n}$-summable subsets with $\frac{1}{\sqrt{n}}$-summable subsets?

9 votes
Accepted

Draw a triangle in the region bounded by a polynomial curve and a straight line. What is the supremum of the ratio of their areas?

8 votes
Accepted

A conjecture on consecutive odd composite numbers

7 votes

Simple Question On Relationship Between Cubes And Squares

6 votes

Are all multivariate functions on finite fields equivalent to a unique polynomial of smallest degree?

6 votes

Fundamental Theorem of Arithmetic - Is my proof right?

5 votes

Is the diameter of a $S^2$ in arbitrary metric on $\Bbb R^3$ just the distance between antipodal points?

5 votes
Accepted

prove that $\sum\limits_{k=3}^n (-1)^k c_k$ doesn't depend on how points are choosen in the plane and it only depends on the amount of $n$

5 votes

Explanation of "paths" in multivariable limits

5 votes

$k$ with an even sum of digits for all multiples of $k$?

5 votes

Transforming a set of equations from one set of variables to another?

4 votes

Shouldn't these two definitions for curvature agree?

4 votes

Toss a fair coin a number of times.

4 votes

Given an array A of size n with elements from 1 to k and another Array B of size k with elements 1 to n. Show that they have a subarray of same sum.

4 votes
Accepted

When are eight integers entirely determined by their pairwise sums?

3 votes
Accepted

determining if a coincident point in a pair of rotated hexagonal lattices is closest to the origin?

3 votes
Accepted

A question about pairwise inner products

3 votes
Accepted

An $n\times n$ matrix $A$ that contains each of $1,2,\cdots, n$ exactly $n$ times and $A^2\equiv 0\pmod n$

3 votes
Accepted

Showing that $\{z\in\mathbb{C}:|z-1|<|z+i|\}$ is an open set

3 votes
Accepted

To Substitute or Not ... $2\sin 2x = 3\tan x$, in interval $0\le x<360^\circ$

3 votes
Accepted

Eigenvalue of Unitary Matrix Interpolation within Unit Disk?

2 votes

How many ways can 25 red balls be put into 3 distinguishble boxes if no box is to contain more than 15 balls?

2 votes
Accepted

Eigenvalues of Left Shift + Right Shift in $l_2([0,\infty))$

2 votes
Accepted

There are $n$ persons sitting around a table...

2 votes

Putnam 2009 A4 clarification

2 votes

Question about Dirichlet's Theorem on Arithmetic Progressions: $ax+b=p$, is $x$ prime at least once?

2 votes
Accepted

Regular Quadratic Space - isotrope vector

2 votes

Is a normed space Euclidean if the norm of any bilinear form equals the norm of the corresponding quadratic form?

2 votes

Is it a subgroup?!