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6Â¥: Originally posted by ÈË×߲費Á¹ at 2015-01-27 09:02:12
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Y=X+ln(X)=ln[exp(X)]+ln(X)=ln[X*exp(X)]
X=W(e^y)
Lambert W function
http://en.wikipedia.org/wiki/Lambert_W_function
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