When is the complement of the comaximal graph of a commutative ring planar?
Summary: Let \(R\) be a commutative ring with identity. In this paper we classify rings \(R\) such that the complement of comaximal graph of \(R\) is planar. We also consider the subgraph of the complement of comaximal graph of \(R\) induced on the set \(S\) of all nonunits of \(R\) with the property that each element of \(S\) is not in the Jacobson radical of \(R\) and classify rings \(R\) such that this subgraph is planar.
scientific article; zbMATH DE number 6304841
scientific article