Mathematica Asked by nilo de roock on November 3, 2020
I made the following function to demonstrate a Number Theory theorem:
f[{A_, p_, x_, y_}] := Module[{m, n, z, w, B},
m = Mod[x, A];
n = Mod[y, A];
z = (x m + y n)/A;
w = (x n - y m)/A // Abs;
B = (z^2 + w^2)/p;
{B, p, z, w}
]
The function works fine with NestList
NestList[f, {85, 509, 208, 1}, 3]
(* {{85, 509, 208, 1}, {17, 509, 93, 2}, {4, 509, 44, 10}, {1, 509, 5, 22}} *)
I want to use NestWhileList, show all intermediate results and terminate when the first element of the input list is 1.
I tried the following:
NestWhileList[f, {85, 509, 208, 1}, #[[1]] == 1 &, All]
(* Mod::indet: Indeterminate expression Mod[0,0] encountered. *)
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