Wikipedia: History of Fundamental group

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Changed: 13c13

Unlike many of the other groups associated with a topological space, the fundamental group need not be Abelian. An example of a space with a non-Abelian fundamental group is the complement of a [trefoil knot]? in R³.

Unlike many of the other groups associated with a topological space, the fundamental group need not be Abelian. In fact, every group is isomorphic to the fundamental group of some topological space. An example of a space with a non-Abelian fundamental group is the complement of a [trefoil knot]? in R³.

	Revision 7 . . August 23, 2001 9:58 pm by Zundark [every group is isomorphic to the fundamental group of some space]
	Revision 6 . . (edit) August 22, 2001 8:46 pm by Zundark [aorund -> around]