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--- advanced_notions:chern-simons [2017/11/20 14:48]
jakobadmin [Student]
+++ advanced_notions:chern-simons [2017/11/20 14:55]
jakobadmin [Student]
@@ Line 18: / Line 18: @@
 For a great summary see section 2 in [[https://arxiv.org/pdf/hep-th/0103017.pdf|Collaborating with David Gross; Descendants of the Chiral Anomaly]] by R. Jackiw
-<note tip>Chern-Simons terms are known under different names in different branches of physics. In fluid mechanics it is usually called "fluid helicity", in plasma physics and magnetohydrodynamics "magnetic helicity". In the context of field theories it is usually called Chern-Simons term.
+<note tip>Chern-Simons terms describe topological properties of systems. A topological property is something that remains unchanged under small geometric changes.
+Chern-Simons terms are known under different names in different branches of physics. In fluid mechanics it is usually called "fluid helicity", in plasma physics and magnetohydrodynamics "magnetic helicity". In the context of field theories it is usually called Chern-Simons term.
 </note>