19 Feb
2016
19 Feb
'16
12:03 a.m.
How does this work? In[787]:= Nest[#/(Sqrt[1 - #] + Sqrt[1 + #]) &, 1`33, 98] 2^99 Out[787]= 3.141592653589793 (I confess not understanding where half the significance goes. Forcing Mathematica to retain 33 digits throughout only rescues three or four.) --rwg
19 Feb
19 Feb
12:27 a.m.
Hello, I think this is Vieta formula for Pi in disguise, 99 terms of it and then multiply by 2, and it would correspond to about 100 terms of it, http://keisan.casio.com/exec/system/1354861725 Best regards, Simon Plouffe
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Simon Plouffe