Re: What's the code for doing the reverse of this code over the altbn128 curve

Thank you, and this would work with any point having the correct order ? 
or would this work only with points having coordinate withing specific 
bounds ?





Dear Laël,

What you are looking for is ffinvmap:

? mapi = ffinvmap(map);
? twisti(pt) = [ffmap(mapi,pt[1]/w^2), ffmap(mapi,pt[2]/w^3)];
? pt3 = twisti(pt2);
? pt3 == pt
%15 = 1

Cheers,
Aurel