Related Notions
The homotopy groups are fundamental to homotopy theory, which in turn stimulated the development of model categories. It is possible to define abstract homotopy groups for simplicial sets.
Read more about this topic: Homotopy Group
Famous quotes containing the words related and/or notions:
“One does not realize the historical sensation as a re-experiencing, but as an understanding that is closely related to the understanding of music, or rather of the world by means of music.”
—Johan Huizinga (1872–1945)
“Shelley is truth itself—and honour itself—notwithstanding his out-of-the-way notions about religion.”
—George Gordon Noel Byron (1788–1824)