Carlssons method for log

[Gusbagro]

Anyone have experiance from the Carlssons method for log?
I have this code but it doesnt seem to work.

def fast_approx_ln(x,n):
    d = empty([n+1,n+1])
    a0 = (1+x)/2
    g0 = sqrt(x)
    for i in range(n):
        a0 = (a0+g0)/2
        g0 = sqrt(a0*g0)
        a0 = d[0,i]
    for k in range(n):
     for i in range(n):
           d[k,i] = (d[k-1,i]-4**(-k)*d[k-1,i-1])/(1-4**(-k))
     return((x-1)/d[n,n])
#print(fast_approx_ln(3,2))

Yoriz write Jul-01-2021, 06:05 PM:
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