why splitting_field () cannot run?
Q1. = NumberField(x^3- 2);Q1; Q2.= CyclotomicField(3);Q2; Q3.<c> = Q2.extension(x^3 - 2);Q3;
GC1=Q1.galois_closure('t');GC1; GC2=Q2.galois_closure('j');GC2; GC3=Q3.galois_closure('u');GC3
G1.splitting_field(); G2.splitting_field();
Traceback (click to the left of this block for traceback) ... AttributeError: 'GaloisGroup_v1' object has no attribute 'splitting_field'
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