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Re: [Phys-l] riddle : entropy



At 10:27 PM 3/22/2007, you wrote:
1) S/N = (log_2(3) - 2/3) bits = 0.918295834 bits
where N = # members in the ensemble

2) S/N = (P_A*log_2(1/P_A) + P_B*log_2(1/P_B)) bits
Substitution of P_A = 1/3 & P_B = 2/3 into the above formula
yields the result 1) above.

Which are the "Lots of 'authoritative' references will lead you
to the wrong answer"? Maybe I'm missing something, but I don't
see what is supposed to be so puzzling here. It seems pretty
straightforward to me with nothing subtle or tricky in the problem.

David Bowman

I looked at the entry for Binary Entropy in Wikipedia, here:
<http://en.wikipedia.org/wiki/Binary_entropy_function>


Brian Whatcott Altus OK Eureka!