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most citedFactorizations of finite groups by conjugate subgroups which are solvable or nilpotent

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math.RA2010

Rings as the unions of proper subrings

Andrea Lucchini, Attila Maroti

We describe all possible ways how a ring can be expressed as the union of three of its proper subrings. This is an analogue for rings of a 1926 theorem of Scorza about groups. We t…