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digital-Ink
  • Member for 10 years, 7 months
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16 votes
6 answers
2k views

Book on combinatorial identities

15 votes
1 answer
2k views

How to address mistakes in published papers?

10 votes
2 answers
2k views

Good book on integral calculus (improper integrals, integrals with parameters, special functions)

9 votes
5 answers
1k views

Enumerative combinatorics applications in Computer Science

7 votes
0 answers
89 views

Partitioning a graph in cycles of four

6 votes
1 answer
232 views

$6$-regular graph of order $25$ and diameter $2$

5 votes
1 answer
1k views

Probability of two independent random variables being equal

4 votes
0 answers
190 views

Reference for the characterization of completeness for metric spaces

4 votes
1 answer
419 views

Behavior of the spectral radius of a convergent matrix when some of the elements of the matrix change sign

3 votes
1 answer
1k views

When two theorems are equivalent? [Formal definition]

3 votes
2 answers
365 views

Triangle-free graph where every pair of nonadjacent vertices has exactly two common neighbors

3 votes
1 answer
135 views

Strongly regular digraph

3 votes
2 answers
1k views

Self-complementary graph of diameter 2

3 votes
1 answer
562 views

Spectral radius and powers of a $2\times 2$ block matrix

3 votes
0 answers
124 views

Optimal partitioning of a graph

2 votes
2 answers
261 views

$2$-coloring of $K_{1,2,2,2,2}$ without monochromatic triangles

2 votes
1 answer
613 views

The closures of a binary relation

1 vote
2 answers
120 views

How to construct an event with a given probability, based on another event

1 vote
2 answers
97 views

Some compactness related property

1 vote
0 answers
119 views

How to simplify a product of matrices

1 vote
2 answers
2k views

Fitting a set of points in a plane to a smooth curve obtained by joining a half-line and an arc of a circle

1 vote
1 answer
64 views

Criteria for a function to be plottable

1 vote
1 answer
183 views

Representation of linear transformation of matrices

1 vote
2 answers
5k views

Practical use and applications of improper integrals

1 vote
1 answer
198 views

Understanding and teaching the concept of derivative

1 vote
1 answer
70 views

Maximize the result in repeated die rolls

1 vote
0 answers
54 views

Residue of $\dfrac{\mathrm{e}^\frac{2}{z}}{\sin z}$ at $0$

0 votes
1 answer
232 views

Proof of the product rule in probability theory for causal independence

0 votes
0 answers
139 views

Bell partial numbers

0 votes
1 answer
650 views

The row- and column-sums of a nonengative matrix with spectral radius less than $1$