On aspherical presentations of groups
نویسندگان
چکیده
منابع مشابه
On Presentations of Surface Braid Groups
We give presentations of braid groups and pure braid groups on surfaces and we show some properties of surface pure braid groups. 1. Presentations for surface braids Let F be an orientable surface and let P = {P1, . . . , Pn} be a set of n distinct points of F . A geometric braid on F based at P is an n-tuple Ψ = (ψ1, . . . , ψn) of paths ψi : [0, 1] → F such that • ψi(0) = Pi, i = 1 . . . , n;...
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ژورنال
عنوان ژورنال: Electronic Research Announcements of the American Mathematical Society
سال: 1998
ISSN: 1079-6762
DOI: 10.1090/s1079-6762-98-00052-3