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Bill Trok's user avatar
Bill Trok's user avatar
Bill Trok's user avatar
Bill Trok
  • Member for 10 years, 6 months
  • Last seen more than 2 years ago
31 votes
Accepted

Are there any bases which represent all rationals in a finite number of digits?

3 votes

Expectation value with condition

3 votes

Denominators of partial sums of the harmonic series

3 votes
Accepted

An open ultrafilter converges if and only if it has non-empty intersection?

2 votes

$U \setminus V \neq \emptyset \iff \text{int}(U\setminus V)\neq \emptyset$ where $U$ and $V$ are open sets.

2 votes

"Here's a cool problem": a collection of short questions with clever solutions

1 vote

How was this sequence discovered?

1 vote

Generalization of $n$ mod $2 = \dfrac{1-(-1)^n}{2}$

1 vote
Accepted

Solving a divisibility problem using group theory

1 vote
Accepted

Given a basis for $\mathbb{R}$, show that it constructs the standard topology on $\mathbb{R}$

1 vote

If the sum of two weakly convergent sequences strongly converges, do the summands strongly converge?

0 votes

Number of possible passwords with $6$ to $8$ characters