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Max Dehn and the Dehn Twist

OPEN NEIGHBORHOOD

February 19, 2020      4:30 pm
Speaker: Peter Kronheimer - Harvard University

Max Dehn made many remarkable contributions to mathematics, and his name pops up in lots of places, most often in topology, where we have "Dehn surgery", the "Dehn twist", and...
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Open Neighborhood Seminar: Negatively curved crystals

OPEN NEIGHBORHOOD

February 5, 2020      4:30 pm
Speaker: Curtis McMullen - Harvard University

Imagine the universe is a periodic crystal. If gravity makes space negatively curved, the thin walls of the crystalline structure might trace out a pattern of circles in the sky, visible...
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