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Jul
4
revised Sparsest matrix with full inverse
Change "at most" to "fewer than" to fix argument; add "in that row" to clarify the scope of "exactly"
Jul
3
comment Finding double root of $x^5-x+\alpha$
And then we have $\gcd(x^5 - x + \alpha, 5x^4 - 1)$ $= \gcd(5x^4 - 1, 4x - 5\alpha)$ $= \gcd(4x - 5\alpha, \frac{3125}{256}\alpha^4 - 1)$, so in order for that GCD to be linear we require $\frac{3125}{256}\alpha^4 - 1 = 0$.
Jun
27
comment Looking for different proofs of “Discrete Liouville's Theorem”.
Can you think of a suitable title which includes some non-LaTeX text? Pure LaTeX titles cause some problems.
Jun
27
comment This should be a piece of cake… right?
It wouldn't have cut more than one piece of cake at once, taking the natural meaning of simultaneously. I've edited to remove that adverb and make other clarifications. There's one remaining ambiguity, which I didn't want to resolve because I didn't know in which direction to resolve it: "the cuts may be done however you want" seems to directly contradict "to make it simple, let's say you have a straightedge and a compass".
Jun
27
revised This should be a piece of cake… right?
Clarify most of the ambiguities; tidy for style
Jun
27
comment This should be a piece of cake… right?
If I put the cakes side-by-side and cut through them all parallel to the table in one motion, is that one cut or $n$?
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 how to find a number greater number to solve those numbers?
Jun
11
reviewed Close Euclidean space and vector field
Jun
11
reviewed Close Definition of standard functions
Jun
11
comment Gosper summable
The case $m=1$ is quite easy. The case $m>1$ seems to require showing that a set of simultaneous equations has no solution.
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 How to solve the expression $x^b-y^b=z^b$?