Created
January 19, 2014 16:11
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| let pos n = | |
| let rec neg(n, k,i) = | |
| if(n-k < 0) then 0.0 | |
| else if i mod 2 = 0 then neg(n,k+1,i+1) +. 1.0 /. float_of_int(4* (n-k) + 1) | |
| else neg(n,k,i+1) -. 1.0 /. (float_of_int(4*(n-k)+3)) in | |
| neg(n,0,0) |
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