Merge pull request LMFDB#5661 from roed314/weierstrass_model

Deal with Weierstrass models where the coefficient of w^2 is not 1
SamSchiavone · Sep 5, 2023 · dba2eeb · dba2eeb
2 parents 2282497 + 2b4b449
commit dba2eeb
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/lmfdb/modular_curves/web_curve.py b/lmfdb/modular_curves/web_curve.py
@@ -187,9 +187,8 @@ def formatted_model(m):
             m["equation"][1], m["equation"][0] = m["equation"]
         C = R3(m["equation"][0])
         F = R4(m["equation"][1])
-        if F.monomial_coefficient(w**2) != -1:
+        if F.monomial_coefficient(w**2).constant_coefficient() > 0:
             F *= -1
-        assert F.monomial_coefficient(w**2) == -1
         lines = [
             latex(elt)
             for elt in [