What are the key contributions of Chris Isham to theoretical physics?

George Jones
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An interesting article about theoretical physicist Chris Isham (by Michael Duff) has been posted on the arXiv,

https://arxiv.org/abs/2112.13722

Combine this with (from "Group Theory for the Standard Model of Particle Physics and Beyond" by Ken Barnes)
Isham.jpg


Isham has written two books that I quite like, “Modern Differential Geometry for Physicists” and "Lectures on Quantum Theory: Mathematical and Structural Foundations" by Chris Isham (1995) (not an axiomatic presentation of quantum mechanics).
 
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