In 1969 she published "On Braid Groups", which introduced a mapping class group of a surface called the Birman Exact Sequence, which became one of the most important tools in the study of braids and surfaces.
In 1969 she published "On Braid Groups", which introduced a mapping class group of a surface called the Birman Exact Sequence, which became one of the most crucial instruments in the study of braids and surfaces.