| bio | website | mathscitech.org/articles |
|---|---|---|
| location | London, United Kingdom | |
| age | ||
| visits | member for | 11 months |
| seen | May 17 at 16:59 | |
| stats | profile views | 24 |
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May 14 |
awarded | Caucus |
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Mar 18 |
answered | Book on advanced topics of Network Flows |
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Mar 18 |
awarded | Excavator |
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Mar 18 |
revised |
Modelling a rail / underground / subway transportation system Expanded title to better reflect the question --- underground is a particular subway system in London. This is about modelling transporation networks more generally. |
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Mar 18 |
suggested | suggested edit on Modelling a rail / underground / subway transportation system |
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Mar 12 |
comment |
What was the first bit of mathematics that made you realize that math is beautiful? (For children's book) @jwg: I get that. My comment wasn't suggesting that the first picture is unnecessary. It was rather to observe that depending on what 'first principles' one wishes to allow, one can build up a proof with different tools. So a pure geometric proof -- yes, both pictures, brilliant. Allow a little algebra with your geometry, and only one picture is required. With algebra only --- well, then you don't have a fact at all! -- Pythagorean theorem is the result of an axiom of a certain kind of metric space.... |
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Mar 8 |
comment |
What was the first bit of mathematics that made you realize that math is beautiful? (For children's book) Allowing a little algbera, one wouldn't need the first picture, only the second: $(a+b)^2 = a^2 + b^2 + 2ab$ gives the area of the big square in terms of the two lengths. The triangles are right triangles and all four are congruent (SAS). The area for triangles is $\frac{1}{2}ab$ and there are 4 of them, for a total area of $2ab$. Since we are removing them from the big square to get the inner square, we are left with the identity: $(a+b)^2 - 4\frac{1}{2}ab = a^2 + b^2 = c^2$. |
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Feb 21 |
revised |
Poisson probability differs from combinatorial probability, why? Annotated the significant addition to the question so that it is not 'lost'. The OP did so, presumably in response to the two answers received, but did not call attention to the extension. |
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Feb 21 |
suggested | suggested edit on Poisson probability differs from combinatorial probability, why? |
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Feb 21 |
revised |
Poisson probability differs from combinatorial probability, why? Elaborated on the extra questions. |
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Feb 21 |
answered | Poisson probability differs from combinatorial probability, why? |
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Feb 19 |
answered | Basic terms for the elements of an observation, sample? |
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Dec 31 |
comment |
Power set difference on the same set. @amWhy: cheers for that. Thx. |
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Dec 31 |
comment |
Power set difference on the same set. @Asaf: I'll second amWhy on my response as well. (And apologies to amWhy as well.) |
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Dec 31 |
comment |
Power set difference on the same set. Sorry -- I'd interpreted Victor's "yes" to in a comment as referring to the question "is this argument anything to do with Russell's Paradox" -- re-reading it (and the confusion above), that's probably not the case. Consider all these withdrawn! |
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Dec 31 |
suggested | suggested edit on Power set difference on the same set. |
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Dec 31 |
awarded | Critic |
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Dec 29 |
comment |
How do I read this question? Transcript resolving the problem. |
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Dec 29 |
comment |
How do I read this question? chat.stackexchange.com/rooms/6879/room-for-ake-and-limitless |
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Dec 29 |
comment |
How do I read this question? Jacobson (in my opinion) is not the clearest author, and I've also found understanding exactly what he means a tad challenging (frustrating?) Do you want to take this into a chat room? It may be quicker and easier there. |