Rebecca J. Stones's user avatar
Rebecca J. Stones's user avatar
Rebecca J. Stones's user avatar
Rebecca J. Stones
  • Member for 10 years, 8 months
  • Last seen more than a week ago
48 votes
5 answers
6k views

The expected outcome of a random game of chess?

26 votes
1 answer
401 views

Does $K_{70,70}$ decompose into subgraphs isomorphic to $K_{1,1}$ through $K_{24,24}$?

16 votes
4 answers
2k views

Why is it legitimate to solve the differential equation $\frac{dy}{dx}=\frac{y}{x}$ by taking $\int \frac{1}{y}\ dy=\int \frac{1}{x}\ dx$?

15 votes
6 answers
594 views

Other guises for the vector space $\mathbb{R}^n$?

13 votes
3 answers
528 views

Probability of $\alpha\beta\gamma=\gamma\beta\alpha$ for random permutations of a finite set?

12 votes
3 answers
3k views

Are indefinite integrals unique up to the constant of integration?

9 votes
1 answer
234 views

Blocking lines of length $5$ in a $7 \times 8$ matrix; how can we know the solutions have a specific form?

9 votes
1 answer
2k views

What is the maximum number of edges in an $n$-vertex non-Hamiltonian graph of minimum degree at least $2$?

8 votes
2 answers
3k views

What is the size of the normalizer of a subgroup generated by a $p$-cycle in a symmetric group?

8 votes
1 answer
4k views

Do all vectors have direction and magnitude?

8 votes
0 answers
1k views

What can we say about two graphs if they have similar adjacency matrices?

8 votes
2 answers
413 views

How was the $3x+1$ problem checked up to $5 \times 2^{60}$?

7 votes
1 answer
151 views

Are there $3$ disjoint copies of $2K_{3,3} \cup (K_{5,5} \setminus C_{10})$ in $K_{11,11}$?

7 votes
1 answer
182 views

Is it possible to decompose $K_{12,12}$ into four edge-disjoint copies of $3(K_{4,4}-I)$?

7 votes
2 answers
1k views

Probability that two random permutations of an $n$-set commute?

7 votes
1 answer
217 views

How to humanly verify $ba^5ba=b^2a^4$ in the group with presentation $\langle a,b : a^7=1, b^3=1, ba^2=ab \rangle$?

6 votes
1 answer
69 views

Does $K_{15,15}$ decompose into $K_{5,5}-C_{10}$ and $K_{5,5}-(C_6 \cup C_4)$ subgraphs?

6 votes
3 answers
5k views

The J programming language: is it useful for mathematics?

6 votes
1 answer
743 views

Why doesn't Cauchy-Schwarz in $\mathbb{R}^n$ generalize to exponents $k>2$?

6 votes
3 answers
2k views

Do all vectors belong to a vector space?

6 votes
0 answers
77 views

Do the two order-4 Latin square graphs have the same number of Hamilton cycles?

6 votes
2 answers
461 views

Does every $9 \times 9$ Latin square contain a $3 \times 3$ submatrix containing each symbol in $\{1,2,\ldots,9\}$?

5 votes
1 answer
319 views

$n$-vertex $3$-edge-colored graphs with exactly $6$ automorphisms which preserve edge color classes, but permute the edge colors distinctly?

5 votes
1 answer
724 views

How to prove that any natural number $n \geq 34$ can be written as the sum of distinct triangular numbers?

5 votes
1 answer
519 views

Seeking a good quality reference for "lifting the exponent"

5 votes
2 answers
188 views

Why should we suspect that the recurrence $T(n) = T(n-1) + n(n-1)$ satisfies a polynomial identity?

5 votes
1 answer
449 views

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

5 votes
2 answers
157 views

Does $K_{12,12}$ decompose into $K_{4,4}-I$ subgraphs?

5 votes
1 answer
320 views

My data is not normally distributed: what can I do to estimate a tail probability?

5 votes
1 answer
2k views

A simple, yet non-superficial explanation of what "paramodulation" means in the context of automated theorem proving?