"Source: Text/Geometry/ModAbVar.text";
"Line: 8923";
"Date: Thu Sep 25 14:47:45 2025";
"Main: Fri Sep 26 14:29:19 2025";
// original file: Text/Geometry/ModAbVar.text, line: 8923
// Example: H148E122 ()
print "Example: H148E122";
ei := GetEchoInput();
SetEchoInput(true);
A := JZero(49);
E := EllipticCurve(A); E;
B := ModularAbelianVariety(E); B;
B eq A;
assert not $1;
IsIsomorphic(A,B);
phi := NaturalMap(A,B);
Degree(phi);
assert $1 eq 1;
phi;
SetEchoInput(ei);
