network profile
| bio | website | twinelogic.com |
|---|---|---|
| location | Seattle, WA | |
| age | 40 | |
| visits | member for | 2 years, 10 months |
| seen | Jul 8 '12 at 5:56 | |
| stats | profile views | 25 |
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Oct 4 |
comment |
A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language @Dour - Are you unaware? By stating that the probability is 0% because the game would otherwise be pointless, what axiom have you invoked? You are reasoning from psychology. Yes, the game would be pointless. What does that have to do with math? |
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May 25 |
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A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language The Monty Hall problem is a psychology problem, not a math problem. If it were a math problem, there would be a defined probability that Monty opens the door which contains the prize, thus giving the contestant certain knowledge. Readers of the problem make the reasonable-for-humans assumption that Monty will not choose the prize door. Further analysis depends on Monty making an IID choice of non-prize doors, or a biased choice. It's a psychology problem. |
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Aug 8 |
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Why is Gimbal Lock an issue? I think he means mathematical gimbal lock, not physical gimbal lock. I don't think he was referring to the magnetic field, but an abstract spherical globe with poles. |
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Aug 7 |
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How do you estimate the flow rate of one fluid into another like the Deep Horizon Oil leak? I'm not sure it belongs on stats, either -- but it does not belong here. Numerical estimation could be its own stackexchange, but it's not mathematics. |
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Aug 7 |
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What is a symmetric group? @Ninefingers: The $f_i$ are the bijections themselves. The members of $X$ represent the corners of a triangle, canonically numbered clockwise for the identity triangle. Each of the $f_i$ transform that triangle by flipping, rotation, or identity -- these are all symmetries. Thus, "symmetry group." |
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Aug 7 |
awarded | Critic |
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Aug 7 |
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Dividing a disk into 7 equal pieces with 3 line segments @Andrea, indeed. -1 |
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Aug 6 |
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Prime satisfying a given condition If you consider 1 as a prime, which most do not, then p=5 is also a solution. |
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Aug 6 |
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How did the notation “ln” for “log base e” become so pervasive?lg is too similar to log but lx (the roman numeral "x") seems workable. ;) |
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Jul 28 |
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Why are derivatives specified as d/dx? In other words, in Leibniz notation, the use of the division notation is intentional. |
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Jul 23 |
awarded | Supporter |
