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Apr
2
revised What is the equation for a tangent to the graph of $y=\arcsin(x/2)$ at the origin?
added 361 characters in body
Apr
2
comment Counting Balls / Elementary Generating Functions
Yes, first problem's bin has $10 \cdot 5 = 50$ balls, the second has $10 + 8 \cdot 4 = 42$ balls.
Apr
2
comment What is the equation for a tangent to the graph of $y=\arcsin(x/2)$ at the origin?
I wonder why -1, look ok to me.
Apr
2
answered what is the difference between $f(x;y)$ and $f(x|y)$?
Apr
2
revised What is the equation for a tangent to the graph of $y=\arcsin(x/2)$ at the origin?
edited tags
Apr
2
answered What is the equation for a tangent to the graph of $y=\arcsin(x/2)$ at the origin?
Apr
2
answered Shouldn't the induction hypothesis be taken only on $n?$
Apr
2
comment Notation for near optimal solution
@MPW hilarious :)
Apr
2
comment Notation for near optimal solution
Welcome to Math.SE, thanks for your question. Hope you stay around and contribute to the site. I haven't seen a standard notation for such things.
Apr
2
comment Can a transcendental number be an infimum of a set of rationals?
@MPW thank you, dumb typo, sorry
Apr
2
comment Can a transcendental number be an infimum of a set of rationals?
@Lubin see the edit, you just need to negate it.
Apr
2
answered Can a transcendental number be an infimum of a set of rationals?
Apr
1
comment How to compute the nth power of a matrix
As is clear from the above argument, it works as long as P is invertible, it doesn't rely on P being orthogonal
Apr
1
comment How to compute the nth power of a matrix
@RyanMcGaha Ryan, see the last update to the answer, I posted my numbers, do we agree?
Apr
1
revised How to compute the nth power of a matrix
added 293 characters in body
Apr
1
comment How to compute the nth power of a matrix
@RecklessReckoner Typo, sorry, $P = \pmatrix{1 & -1\\-1 &2}$ and $P^{-1}$ is correct.
Apr
1
comment linear differential equation problem
@jesse fixed type
Apr
1
revised linear differential equation problem
edited body
Apr
1
comment How to compute the nth power of a matrix
@RyanMcGaha it sounds like the order is wrong, shouldn't you have $P = \pmatrix{1 & -1 \\1 & 2}$ with $P^{-1} = \pmatrix{2 & 1 \\1 & 1}$?
Apr
1
comment How to compute the nth power of a matrix
@RyanMcGaha what are you using for $D$ and $P$?