1,822 reputation
21133
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location Palo Alto, CA
age 24
visits member for 3 years, 8 months
seen 20 hours ago

Jan
30
awarded  Popular Question
Dec
18
awarded  Yearling
Nov
21
awarded  Popular Question
Jun
8
awarded  Caucus
Dec
18
awarded  Yearling
Oct
11
asked When does $a + b$ divide $a^p + b^p$?
Oct
11
asked Why does $a^n - b^n$ never divide $a^n + b^n$?
Aug
29
awarded  Good Question
Aug
29
comment What's the probability that a sequence of coin flips never has twice as many heads as tails?
This solution is beautiful! One thing I don't understand is, how did you set boundary conditions for the region n >= 0?
Aug
27
comment What's the probability that a sequence of coin flips never has twice as many heads as tails?
Wow, incredible (both the write up and the result itself)! However, I have a slight point of confusion--why is S(1) = 1, rather than 3?
Aug
27
comment What's the probability that a sequence of coin flips never has twice as many heads as tails?
Sorry, I'm not sure I follow. Can you please explain what P(n) represents in slightly more detail?
Aug
27
awarded  Nice Question
Aug
27
asked What's the probability that a sequence of coin flips never has twice as many heads as tails?
Aug
24
awarded  Nice Question
Aug
22
awarded  Enlightened
Aug
22
awarded  Nice Answer
Jul
30
awarded  Nice Question
Jul
10
comment Proving the countability of algebraic numbers
An alternative approach to showing that polynomials with integer coefficients are countable: consider the bijection $\phi: \mathbb{Z}[x] \rightarrow \mathbb{N}$ that sends the polynomial $a_0 + a_1x + a_2x^2 + \ldots + a_nx^n$ to the natural number $2^{b_0}3^{b_1}5^{b_2}\cdots p_n^{b_n}$ (notation: $p_i$ is the $i$-th prime number and $b_i$ is the image of $a_i$ under any bijection from the integers to the natural numbers).
Jul
9
comment Motivating linear algebra for economics students?
Why the -1? Anything I can do to improve this question?
Jul
9
asked Motivating linear algebra for economics students?