Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Joan Sylvia Lyttle Birman (amụrụ na Mee 30, 1927 na New York City) bụ onye America na-agụ mgbakọ na mwepụ, ọkachamara na obere-dimensional topology. O nyela onyinye maka ọmụmụ nke knots, 3-manifolds, mapping class groups of surfaces, geometric group theory, contact structures and dynamical systems. Birman bụ ugbu a Prọfesọ Nchọpụta Emerita na Barnard College, Mahadum Columbia, ebe ọ nọ kemgbe 1973.  Ajụjụ: Olee ebe Joan Birman bụ ọkachamara n'ihe gbasara mgbakọ na mwepụ?
obere-dimensional topology