# Questions tagged [path-integral]

The path integral formulation of quantum mechanics is a description of quantum theory that generalizes the action principle of classical mechanics. It replaces the classical notion of a single, unique classical trajectory for a system with a sum, or functional integral, over an infinity of quantum-mechanically possible trajectories to compute a quantum amplitude. This formulation has proven crucial to the subsequent development of theoretical physics.

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### Peter Freyd on path Integral?

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### Ratios of Gaussian integrals with a positive semidefinite matrix

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### References for computing $n$-point correlations in Chern-Simons theory

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### Path integral as quantum mechanics on the tangent bundle

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### Yang-Mills theory with non-compact gauge groups G

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