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Theoretical physicist by training, PhD in spin-polarized quantum systems. Inventor of the DPD micro-hydrodynamics simulation methodology, and specialized in computational physics. Currently chief scientist for a major corporation. Blogger at Science2.0.


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9
awarded  Caucus
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9
awarded  Yearling
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awarded  Autobiographer
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awarded  Nice Answer
Aug
31
comment Proof of Gauss' Law of gravitation without reference to Newton?
"Where does the 4π come from?" That's Sir Isaac failing to put a factor $4\pi$ in the denominator of the universal law of gravitation.
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revised Binomial triplets
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comment Binomial triplets
OEIS has listed quite a few tetrahedral numbers that are the sum of two other tetrahedral numbers: oeis.org/A034404 .
Aug
17
comment Binomial triplets
Two more: $\binom{22}{3}+\binom{56}{3}=\binom{57}{3}$ and $\binom{32}{3}+\binom{57}{3}=\binom{60}{3}$.
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revised Binomial triplets
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17
revised Binomial triplets
Link to OEIS
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17
revised Binomial triplets
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17
revised Binomial triplets
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Aug
17
revised Binomial triplets
Simplified notation (abandon normalisation for polytopic numbers), corresponding new title
Aug
16
comment Problems that become easier in a more general form.
@DavidK - the text I included is Wikipedia's description of the Monty Hall problem. Have modified it.
Aug
16
revised Problems that become easier in a more general form.
Modified description of MH problem
Aug
16
revised Problems that become easier in a more general form.
Typo + concluding sentence
Aug
16
revised Problems that become easier in a more general form.
Link
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16
answered Problems that become easier in a more general form.
Aug
16
revised Binomial triplets
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16
revised Binomial triplets
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