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non-totally ramified pts and holo diffs - 2nd try

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jgarnek 2024-02-09 09:09:09 +00:00
parent 7bfae60f57
commit 9585d6995b
2 changed files with 12 additions and 19 deletions
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6
drafty/draft2.sage
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@ -5,8 +5,8 @@ P1 = superelliptic(x^2 + 1, 2)
fct1 = (P1.x)^2
fct2 = fct1 + (P1.x)/(P1.y - P1.x)
fct3 = (P1.x)^4
C = heisenberg_cover(P1, [1/2*fct1, fct2, fct3], prec=300)
C = heisenberg_cover(P1, [1/2*fct1, fct2, fct3], prec=500)
print(C)
B = C.holomorphic_differentials_basis()
print("Computed basis")
a1, b1, c1 = heisenberg_group_action_matrices_holo(C, basis = B)
#print("Computed basis")
#a1, b1, c1 = heisenberg_group_action_matrices_holo(C, basis = B)

21
heisenberg_covers/heisenberg_covers.sage
View File

@ -138,27 +138,20 @@ class heisenberg_cover:
S += [(eta, eta_exp)]
forms = heisenberg_holomorphic_combinations(S)
for pt in self.branch_points[1:]:
forms = [(omega, omega.expansion(pt=pt)) for omega in forms]
print("next iteration")
for pt in self.branch_points:
for g in [(0, i, 0) for i in range(p)]:
print("next iteration")
if pt != self.branch_points[0] or g != (0, 0, 0):
forms = [(omega, omega.group_action(g).expansion(pt=pt)) for omega in forms]
forms = heisenberg_holomorphic_combinations(forms)
return forms
if len(forms) < self.genus():
print("I haven't found all forms, only ", len(forms), " of ", self.genus())
return holomorphic_differentials_basis(self, threshold = threshold + 1)
if len(forms) > self.genus():
forms1 = []
for omega in forms:
flag = 1
for g in self.group:
for i in range(self.nb_of_pts_at_infty):
if omega.group_action(g).valuation(i) < 0:
flag = 0
if flag == 1:
forms1 += [omega]
if len(forms1) == self.genus():
return forms1
raise ValueError("Increase precision.")
return forms