Differential forms and κ-Minkowski spacetime from extended twist

We analyze bicovariant differential calculus on kappa-Minkowski spacetime. It is shown that corresponding Lorentz generators and noncommutative coordinates compatible with bicovariant calculus cannot be realized in terms of commutative coordinates and momenta. Furthermore, kappa-Minkowski space and NC forms are constructed by twist related to a bicrossproduct basis. It is pointed out that the consistency condition is not satisfied. We present the construction of kappa-deformed coordinates and forms (super-Heisenberg algebra) using extended twist. It is compatible with bicovariant differential calculus with kappa-deformed igl(4)-Hopf algebra. The extended twist leading to kappa-Poincare-Hopf algebra is also discussed.