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cardboard_box
  • Member for 10 years
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26 votes

Is there a function whose inverse is exactly the reciprocal of the function, that is $f^{-1} = \frac{1}{f}$?

8 votes

A chess knight's moves

5 votes

How to evaluate this sum $\sum\limits_{i=1}^{n} \left \lfloor \sqrt{2} \cdot i \right \rfloor$

5 votes

The equation $a^3 + b^3 = c^2$ has solution $(a, b, c) = (2,2,4)$.

4 votes
Accepted

Construct a continuous function $f$ over $[0,1]$ satisfying $f(0) = f(1)$ but $f(x) \neq f(x+a)$

3 votes
Accepted

Polynomial divides set of points

2 votes
Accepted

Limit of a floor sum

2 votes
Accepted

finding edges of a triangle graph from degrees of points

1 vote
Accepted

Is the language regular

1 vote
Accepted

Subset of regular language $a^*$

1 vote

Balls and Urn Paradox

1 vote
Accepted

Maximising the logarithmic expectation in coin bets

1 vote
Accepted

Changing (enlarging) the domain in a Quantified statement

1 vote
Accepted

How to prove that Tree $T_1$ has a perfect elimination scheme (PES)