theorem Th45:
for
p being
Prime for
a,
b being
Element of
(GF p) for
P,
Q being
Element of
[: the carrier of (GF p), the carrier of (GF p), the carrier of (GF p):] for
d being
Element of
(GF p) st
p > 3 &
Disc (
a,
b,
p)
<> 0. (GF p) &
P in EC_SetProjCo (
a,
b,
p) &
d <> 0. (GF p) &
Q `1_3 = d * (P `1_3) &
Q `2_3 = d * (P `2_3) &
Q `3_3 = d * (P `3_3) holds
Q in EC_SetProjCo (
a,
b,
p)