Srinivasa Ramanujan sent a sequence to G.H.Hardy in Cambridge:

1-5*(1/2)^3+p((1*3)/(2*4))^3-13((1*3*5)/(2*4*6))^3 + ...= 2/Pi

Any information about this infinite sequence is greatly appreciated...

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- Oct 12th 2005, 03:27 AM #1mitumGuest

- Oct 20th 2005, 08:59 PM #2

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Hardy said of Ramanujan's formulas, some of which he could not initially understand, that "a single look at them is enough to show that they could only be written down by a mathematician of the highest class. They must be true, for if they were not true, no one would have had the imagination to invent them."

found this from wikipedia.org. http://en.wikipedia.org/wiki/Ramanujan

also 1/Pi

- Nov 6th 2005, 05:06 PM #3

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