Hyperbolic products of groups
The author introduces the notion of hyperbolic product of a finite number of finitely presented groups. It is proved that the hyperbolic product of a hyperbolic group is a hyperbolic group. Also it is shown that the covering on a free product of the relations satisfying the small cancellation conditions of type \(C'(1/6)\) or \(C'(1/4)\& T(4)\) yields a hyperbolic product.
scientific article; zbMATH DE number 1524036