is_unit()

virtual bool Ring::is_unit ( const ring_elem f ) const

pure virtual

Implemented in FractionField, GF, LocalRing, M2::ConcreteRing< RingType >, M2::ConcreteRing< ARingQQ >, M2::ConcreteRing< M2::ARingCCC >, M2::ConcreteRing< M2::ARingRRR >, M2FreeAlgebra, M2FreeAlgebraQuotient, PolyRing, PolyRingQuotient, RingZZ, SchurRing2, Tower, and Z_mod.

Referenced by Matrix::dimension1(), LocalRing::eval(), FreeAlgebra::is_unit(), and RingElement::is_unit().