... D1,E1,F1of tangency of the incircle γ of DEF with its sides(D1∈ EF, etc.). Consider the circle Γgwith center O and radius g thatlies inside DEF and tangents Γd,Γe,Γf.4.44 Shortlisted ... fact, we would concludeonly that 2n+2divides the order p2− 1 of the group. However, it willbe enough to find a u ∈ Zp(√3) such that u2=2+√3, since then theorder of u is equal to ... =[a0; a1,a2, ,an].Since n depends only on x, the function s(x)=(−1)nis well -de ned. Forx<0 we de ne s(x)=−s(−x), and set s(0) = 1. We claim that this s(x)satisfies the requirements...