The Klein-Gordon Propagator

1. Klein-Gordon Equation The Klein-Gordon equation is a relativistic wave equation, related to the Schrödinger equation. It is second order in space and time and manifestly Lorentz covariant. It is a quantized version of the relativistic energy–momentum relation. Its solutions include a quantum scalar or pseudoscalar field, a field whose quanta are spinless particles. The […]

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From Denver To Seattle

Preface, July 21, Houston There’s no windows in our lab. Daylight passes without any signs left. Sometimes, I knew it’s pouring only when I stepped out this building. Or sometimes, the road was already dry, but the flowers under the crape myrtle trees told me a rain had just past. Eyesight began to drop again. […]

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Notes on Regression Analysis

1. Regression Analysis Regression analysis is a statistical process for estimating the relationships between a dependent variable() and one or more independent variables(). That is, estimating the parameters (also called weights) in (1)   based on some training examples . Regression analysis is widely used for prediction and forecasting, where its use has substantial overlap […]

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