meta user
network profile
| bio | website | |
|---|---|---|
| location | Stanford, CA | |
| age | 22 | |
| visits | member for | 2 years, 5 months |
| seen | May 6 at 6:13 | |
| stats | profile views | 400 |
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May 7 |
awarded | Popular Question |
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Jan 30 |
awarded | Popular Question |
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Dec 18 |
awarded | Yearling |
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Nov 21 |
awarded | Popular Question |
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Jun 8 |
awarded | Caucus |
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Dec 18 |
awarded | Yearling |
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Oct 11 |
asked | When does $a + b$ divide $a^p + b^p$? |
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Oct 11 |
asked | Why does $a^n - b^n$ never divide $a^n + b^n$? |
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Aug 29 |
awarded | Good Question |
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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? |
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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? |
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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? |
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Aug 27 |
awarded | Nice Question |
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Aug 27 |
asked | What's the probability that a sequence of coin flips never has twice as many heads as tails? |
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Aug 24 |
awarded | Nice Question |
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Aug 22 |
awarded | Enlightened |
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Aug 22 |
awarded | Nice Answer |
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Jul 30 |
awarded | Nice Question |
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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). |
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Jul 9 |
comment |
Motivating linear algebra for economics students? Why the -1? Anything I can do to improve this question? |
