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Title:
Inertia Groupoids and their singularity structure or why we need a concept of stratified groupoids

Speaker:
Markus Pflaum

Link:
http://www.birs.ca/events/2017/5-day-workshops/17w5023/videos/watch/201704201417-Pflaum.html

Workshop:
Birs- 17w5023: Geometric Structures on Lie Groupoids