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The following sections are included:PreliminaryLinear perturbation theorySingle field slow-roll inflationÎ´N formalism in linear perturbation theoryÎ´N formalism in slow-roll inflationÎ´N formalism in multi-field inflation beyond slow-rollNon-linear Î´N formalismThe Einstein equationsGradient expansionLeading order in gradient expansionCurvature perturbation and non-linear Î´N formulaStatistical quantitiesPower spectrum in cosmological perturbation theoryPower spectrum and spectral index in Î´N formalismNon-GaussianitiesImplementation of Î´N formalism for non-GaussianityPreliminary Linear perturbation theory Single field slow-roll inflation Î´N formalism in linear perturbation theory Î´N formalism in slow-roll inflation Î´N formalism in multi-field inflation beyond slow-roll Non-linear Î´N formalism The Einstein equations Gradient expansion Leading order in gradient expansion Curvature perturbation and non-linear Î´N formula Statistical quantities Power spectrum in cosmological perturbation theory Power spectrum and spectral index in Î´N formalism Non-Gaussianities Implementation of Î´N formalism for non-Gaussianity
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