G-ring
A ring that is a both G-ring and a J-2 ring is called a quasi-excellent ring , and if in addition it is universally catenary it is called an excellent ring . 
<triplet> quasi-excellent ring <subj> G-ring <obj> subclass of <subj> J-2 ring <obj> subclass of <triplet> excellent ring <subj> G-ring <obj> subclass of <subj> J-2 ring <obj> subclass of <subj> universally catenary <obj> subclass of