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Jun
25
comment The expected outcome of a random game of chess?
@mjqxxxx, I think it's because the chess library considers the game to be over when neither player has enough material to mate, and so breaks the loop, but doesn't consider it to be a stalemate, so it wasn't being counted correctly.
Jun
20
answered Source coding and Entropy
Jun
20
answered Closed form for the Stirling numbers of the second kind.
Jun
19
comment A game with numbers from MEMO $2013$
Surely the simplest first two moves for B are $0,0$.
Jun
16
revised History of a combinatoric problem: exchanging numbers by throwing stones
Correct spelling of username
Jun
16
asked History of a combinatoric problem: exchanging numbers by throwing stones
Jun
12
comment How do you create a nonlinear game that the player can always win?
The way to maximise the non-linearity is to minimise the interdependence of the puzzles. The point I'm hoping that you'll take away is that you need to rethink your goal.
Jun
12
answered How do you create a nonlinear game that the player can always win?
Jun
11
reviewed Close Definition of standard functions
Jun
10
comment Hex game winning strategy
It's not clear from the question what the board layout is (you can do ASCII art by putting 4 spaces before each line, and there are online designs for ASCII art hexagons), or what the rules of the game are.
Jun
3
reviewed Close Absolute and Conditional Convergence of the integral $\frac{\sin(x)}{x^p}$ for real values of $p$
Jun
3
answered Probability a polynomial has a root which is a root of unity
May
21
comment Deterministic Push-Down Automata
Is $U$ a terminal? And as a hint: have you tried building a non-deterministic push-down automaton to recognise this language?
May
21
comment What is one way to prove that there exists no ellipse that matches the exact curvature of the sin wave?
That doesn't rule out the sine wave being less than half of an ellipse.
May
16
comment what is the minimum value of the angles inside these triangles?
I think the question is: what is the smallest angle $\alpha$ such that there exists a dissection of the square into triangles satisfying two properties: that none of the triangles has an internal angle greater than $\alpha$; and that no vertex of a triangle touches another triangle except at a vertex. If so, there's an easy lower bound of 67.5 degrees.
May
15
answered Turing Machine Decidability
May
13
answered Non-inductive, not combinatorial proof of $\sum_{i \mathop = 0}^n \binom n i^2 = \binom {2 n} n$
May
13
answered Unbounded sequence with convergent subsequence
May
12
awarded  Nice Question
May
6
comment Calculate the Probability for Binary Matrix
I assume that the second sentence means that each element of the matrix is $1$ with probability $p$, but is the third sentence talking about independence of random variables or about linear independence (i.e. the matrix is non-singular)?