11. This observation generalises to the Lie bracket. 12. A linear graph has a natural topology that generalises many of the geometric aspects of edges. 13. This definition generalises to topological spaces by replacing " open ball " with " open set ". 14. But unlike the axis of rotation the plane generalises into other, in particular higher, dimensions. 15. Since every manifold is a super manifold, a Lie supergroup generalises the notion of a Lie group. 16. In the 1970s Askold Georgevich Khovanski? developed the theory of " fewnomials " that generalises Descartes'rule. 17. In abstract algebra, the idea of an "'inverse element "'generalises concepts of a group. 18. This generalises , but in some sense with loss of explicit information ( as is typical of several complex variables ). 19. This generalises Sz .-Nagy's dilation theorem as all contractions have the unit disc as a spectral set. 20. This generalises Sz .-Nagy's dilation theorem, which can be seen as a consequence of this by letting
