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Apr
27
revised When is a recurrence relation linear
edited tags
Apr
27
revised There is a table of the complexity of recursive algoritms?
edited tags
Apr
26
comment Calculating the highest possible damage achievable using 6 items from a pool of ~25
Probably belongs on SO.
Apr
25
comment Inclusion-exclusion principle: Number of integer solutions to equations
@DAK: Reread Gerry's last paragraph. For the intersection of $A_1$ and $A_2$, it's equivalent to solving $v_1+v_2+y_3+y_4=5$ with $v_1, v_2, y_3, y_4 \ge 0$. Just like the number of solutions to solve $y_1+y_2+y_3+y_4 = 12$ is $C(15,3)$, the number of solutions to that equation (and the size of the $\lvert A_1 \cap A_2 \rvert$ set) is $C(8,3)$.
Apr
25
comment Inclusion-exclusion principle: Number of integer solutions to equations
I agree, I think it's $C(12 + 4 - 1, 3) = C(15,3)$.
Apr
16
awarded  Nice Question
Apr
13
comment Can (x'y' + xy) be simplified?
@Brandon: You should probably write that as an answer.
Apr
13
comment Draw customized (calculus) graphs like these?
Not sure whether to flag it, but I have enough rep to retag stuff so I got rid of the graph-theory tag.
Apr
13
revised Draw customized (calculus) graphs like these?
edited tags
Apr
12
suggested rejected edit on Probability of having at least 'k' marbles specific to each of 'm' bags filled by sampling with replacement
Mar
31
comment Interpreting “lying on the parabolas”
Out of curiosity, how do you get Mathematica to make that?
Mar
27
revised On deriving the arclength of a hyperbola
Just formatting.
Mar
27
suggested approved edit on On deriving the arclength of a hyperbola
Mar
20
comment Numbers satisfying $\binom{n}{k} = m!$
I just wrote a script and I don't believe there are any others up to 13! (except of course $\binom{n}{0}$ and $\binom{n}{1}$).
Mar
20
revised expected area of a triangle determined by randomly placed points
fix formatting again
Mar
20
suggested approved edit on expected area of a triangle determined by randomly placed points
Mar
20
revised expected area of a triangle determined by randomly placed points
fixed formatting
Mar
20
suggested approved edit on expected area of a triangle determined by randomly placed points
Mar
20
revised Non-Standard Deviation
absolute value instead of diff()
Mar
20
awarded  Organizer