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enzocreti 2020-07-02 09:29

collatz 3x+1
I found a forumula about the 3x+1 problem

let be T(k,n) the trajectory starting from integer n.

k is the number of iterations

T(0,n)=n i think

T(k,n)=n*lambda(k,n)+rho(k,n) how to proof that?

where lamba(k,n)=(3^(x(0,n)+...+x(k-1,n))/2^k

x(0,n) the parity vector of 1's and 0's, 1 if x(i,n) is odd and 0 if it is even

rho is a sum from i=0 to k-1 of



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