Seminar series
Date
Tue, 14 Mar 2017
Time
12:00 -
13:30
Location
L5
Speaker
Guo Chuan Thiang
Organisation
Adelaide
The "Weyl fermion" was discovered in a topological semimetal in
2015. Its mathematical characterisation turns out to involve deep and subtle
results in differential topology. I will outline this theory, and explain
some connections to Euler structures, torsion of manifolds,
and Seiberg-Witten invariants. I also propose interesting generalisations
with torsion topological charges arising from Kervaire semicharacteristics
and ``Quaternionic'' characteristic classes.