TL;DR
This paper offers a rigorous proof of the CPT theorem within the Lagrangian quantum field theory framework, contrasting with previous proofs in axiomatic approaches and non-rigorous sketches.
Contribution
It provides the first rigorous proof of the CPT theorem specifically within the Lagrangian framework of quantum field theory.
Findings
Established a rigorous proof of the CPT theorem in Lagrangian QFT
Clarified differences between axiomatic and Lagrangian approaches
Enhanced theoretical foundations of quantum field theory
Abstract
We provide a rigorous proof of the CPT theorem within the framework of 'Lagrangian' quantum field theory. This is in contrast to the usual rigorous proofs in purely axiomatic frameworks, and non-rigorous proof-sketches within the Lagrangian framework.
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