1 files changed, 0 insertions, 68 deletions
diff --git a/theta_lib/theta_structures/montgomery_theta.py b/theta_lib/theta_structures/montgomery_theta.py
deleted file mode 100644
index 6dddb2b..0000000
--- a/theta_lib/theta_structures/montgomery_theta.py
+++ /dev/null
@@ -1,68 +0,0 @@
-from sage.all import *
-
-def torsion_to_theta_null_point(P):
-	r=P[0]
-	s=P[2]
-	return (r+s,r-s)
-
-def montgomery_point_to_theta_point(O,P):
-	if P[0]==P[2]==0:
-		return O
-	else:
-		a,b=O
-		return (a*(P[0]-P[2]),b*(P[0]+P[2]))
-
-def theta_point_to_montgomery_point(E,O,P,twist=False):
-	a,b=O
-
-	x=a*P[1]+b*P[0]
-	z=a*P[1]-b*P[0]
-
-	if twist:
-		x=-x
-
-	if z==0:
-		return E(0)
-	else:
-		x=x/z
-
-		a_inv=E.a_invariants()
-		
-		A =a_inv[1]
-		if a_inv != (0,A,0,1,0):
-			raise ValueError("The elliptic curve E is not in the Montgomery model.")
-
-		y2=x*(x**2+A*x+1)
-		if not is_square(y2):
-			raise ValueError("The Montgomery point is not on the base field.")
-		else:
-			y=y2.sqrt()
-			return E([x,y,1])
-
-def lift_kummer_montgomery_point(E,x,z=1):
-	if z==0:
-		return E(0)
-	elif z!=1:
-		x=x/z
-
-	a_inv=E.a_invariants()
-		
-	A =a_inv[1]
-	if a_inv != (0,A,0,1,0):
-		raise ValueError("The elliptic curve E is not in the Montgomery model.")
-
-	y2=x*(x**2+A*x+1)
-	if not is_square(y2):
-		raise ValueError("The Montgomery point is not on the base field.")
-	else:
-		y=y2.sqrt()
-		return E([x,y,1])
-
-def null_point_to_montgomery_coeff(a,b):
-	return -2*(a**4+b**4)/(a**4-b**4)
-
-
-
-
-
-