56

Answers

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1

Asking about a quasicommutative semigroup

1

Number of possible circuits with N NOR gates and M inputs

1

sorting two paired lists of real numbers to minimize consecutive absolute differences

1

Maximum distance within a subset of permutations

1

Hamiltonian cycles in power-graphs

1

What is the maximal sparsity of a matrix?

2

power of adjacency matrix

2

Math for a cake

2

Smallest square to wrap a cylinder

0

Similarity measure between 2 bi-partite graph.

6

Excellent mathematical explanations

1

Positive results coming from paradoxes

0

How should one look at the set of compatible ring structures on a given group?

5

Sieve of Erathostenes: removing consecutive items

0

Nonzero convex combinations of convex hull vertices to yield an inner point

1

Measuring big stuff

1

Can pure mathematics harness citizen science?

0

max # of words with restricted total content

1

Does every bipartite graph with 512 edges have an induced subgraph with 256 edges? (2)

3

What is the number of $2n\times 2n$-matrices $g=\begin{pmatrix} A & B \\\ C & -A^{t} \end{pmatrix}$, $B$ and $C$ symmetric, over the finite field $\mathbb{F}\_{q}$ with $\mathrm{rank}(g)=k$?

2

Believing the Conjectures

4

Large Intersecting Subsets of a Set

1

analogue of a set with n binary operations

1

Analogues of Jacobsthal’s function

5

How many binary operations are associative?

1

Provided a list of sets, $L$, computing an array where each entry $q_i \in Q$ is the family of sets in $L$ that have intersection $k$ with $l_i \in L$

0

Real functions with finitely many zeroes

0

The Inverse of the Euler Totient Function

1

A weird function related to the denominators of rational squares

2

partly obscured Rubik’s cube