= Time-sliced configuration-space path integral
For a <Hamiltonian operator> with <kinetic term> $\hat p^2/2$, insert position-basis resolutions between <Trotter product formula> factors. The measure is the limit of $(2\pi i\Delta)^{-M/2}\prod_{j=1}^{M-1}dq_j$, and the exponent contains $\sum_j[(q_j-q_{j-1})^2/(2\Delta)-\Delta V(q_{j-1})]$. Its continuum notation is $\int\mathcal Dq\,e^{iS[q]}$, with fixed endpoint values. A damping prescription defines the oscillatory limit.
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