Changes in version 1.1-0 (2022-12-11) - drop() functionality - bugfixes: is.constant() - consistent citations in the vignette Changes in version 1.0-9 - added abelianize() following freegroup::abelianize() Changes in version 1.0-8 (2022-08-28) - bugfixes Changes in version 1.0-4 (2022-01-05) - add an adjoint function ad() - new vignette: adjoint.Rnw Changes in version 1.0-3 (2021-11-19) - add a sticker - coeffs() returns a disord object