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:
“No being exists or can exist which is not related to space in some way. God is everywhere, created minds are somewhere, and body is in the space that it occupies; and whatever is neither everywhere nor anywhere does not exist. And hence it follows that space is an effect arising from the first existence of being, because when any being is postulated, space is postulated.”
—Isaac Newton (1642–1727)
“Assumptions that racism is more oppressive to black men than black women, then and now ... based on acceptance of patriarchal notions of masculinity.”
—bell hooks (b. c. 1955)