meta user
network profile
| bio | website | in.another.dimension |
|---|---|---|
| location | Athens, Greece | |
| age | 45 | |
| visits | member for | 2 years, 2 months |
| seen | 17 hours ago | |
| stats | profile views | 57 |
Interests: math, programming and games, not necessarily in that order.
Not sure if my next web app will make me a millionaire or a billionaire. In the mean time, I'm looking for a new job. Send proposals to my personal email: ypercube@gmail.com
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May 6 |
awarded | Caucus |
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Apr 14 |
answered | To find the logarithm of $1728$ to the base $2 \sqrt{3}$ |
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Mar 12 |
comment |
Weird math question in ACT prep What might be misleading? That you say "fraction" while you probably mean "proper fraction"? |
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Mar 11 |
comment |
Weird math question in ACT prep Why do you think that a and b are necessarily fractions? "Fraction" does not mean an (absolute) value of less than 1. |
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Feb 25 |
comment |
Prove that $ 1 + \dfrac{1}{2} + \dfrac{1}{3} + \cdots + \dfrac{1}{n} = \mathcal{O}(\log(n)) $. I agree that it may be confusing but it's used in many Computer Science books. |
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Feb 25 |
comment |
Prove that $ 1 + \dfrac{1}{2} + \dfrac{1}{3} + \cdots + \dfrac{1}{n} = \mathcal{O}(\log(n)) $. @Code-Guru The = in notation f(n) = O(g(n)), does not stand for equality. |
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Feb 12 |
awarded | Civic Duty |
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Jan 12 |
awarded | Citizen Patrol |
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Nov 29 |
comment |
Can every proof by contradiction also be shown without contradiction? @amWhy: You say "One of the advantageous to constructing direct proofs of propositions, when this is feasible, is that one can discover other useful propositions in the process. " I agree but proofs by contradiction (or rather, attempts to proofs) can also lead to wonderful discoveries (non-euclidean geometry comes to mind). |
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Nov 29 |
comment |
Can every proof by contradiction also be shown without contradiction? +1 Great explanation. Can you emphasize the affirmative answer?: So there are statements that are provable by contradiction that are not provable directly. |
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Nov 2 |
comment |
Spatial Geometry - Hole in Sphere And this question has the calculus solution: Given a solid sphere of radius R, remove a cylinder whose central axis goes through the center of the sphere. |
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Nov 2 |
comment |
Spatial Geometry - Hole in Sphere @rschwieb: No, that's a "well"-known puzzle. The volume does not depend on the radius of the sphere. |
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Sep 24 |
comment |
How is $e^x$ read aloud? I would vote that this question is off-topic for this site. Perhaps it would fit better at the English.SE one. |
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Aug 24 |
comment |
Theorems with an extraordinary exception or a small number of sporadic exceptions @AsafKaragila: Of course your theorem is a fallacy. It fails for number 10. |
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Aug 5 |
revised |
Evaluate $\lim_{n\to \infty}(\frac{1}{n+1}+\frac{1}{n+2}+\cdots+\frac{1}{6n})$ edited body |
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Aug 5 |
answered | Evaluate $\lim_{n\to \infty}(\frac{1}{n+1}+\frac{1}{n+2}+\cdots+\frac{1}{6n})$ |
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Jul 20 |
comment |
Are there an infinite set of sets that only have one element in common with each other? @Oltarus: Perhaps you can count them, to see if they are actually 50 - and not count on the manufacturer's word. |
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Jul 19 |
comment |
Are there an infinite set of sets that only have one element in common with each other? A related question (about the same game) at Math.SE: What is the math behind the game Spot It? and at SO: What are the mathematical/computational principles behind this game? |
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Jul 19 |
comment |
What's behind Conway's Game of Life search algorithms? @DariusGoad: It's not what many (or few) people think but what the Law says. The Terms of Service were written mostly caring about the Law. And while it may or may not be a good measure of maturity, it's very acccurate and provable. |
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Jul 9 |
awarded | Yearling |
