Theory 10
- The Källén–Lehmann Spectral Representation: How the Full Propagator Encodes the Physical Spectrum
- The Heat Kernel Expansion and Seeley–DeWitt Coefficients: Computing the One-Loop Effective Action
- Schwinger-Dyson Equations and the Structure of the Quantum Effective Action
- Reflection Positivity and the Osterwalder–Schrader Axioms: Reconstructing Unitary QFT from Euclidean Correlators
- Spontaneous Symmetry Breaking, the Higgs Mechanism, and Goldstone's Theorem
- Anomalies, Topology, and Index Theory in Quantum Field Theory
- BRST Symmetry and Cohomological Quantization of Gauge Theories
- AdS/CFT Correspondence: Holographic Duality and its Role in Quantum Gravity
- The Action Principle as the Language of Fundamental Physics
- Why a Theory of Everything Is Difficult