Stationary phase approximation

（重定向自Principle of stationary phase）

In mathematics, the stationary phase approximation is a basic principle of asymptotic analysis, applying to oscillatory integrals

taken over n-dimensional space ℝ where i is the imaginary unit. Here f and g are real-valued smooth functions. The role of g is to ensure convergence; that is, g is a test function. The large real parameter k is considered in the limit as $k \to \infty$ .

单词	Principle of stationary phase
释义	Principle of stationary phase 英语百科 Stationary phase approximation （重定向自Principle of stationary phase） In mathematics, the stationary phase approximation is a basic principle of asymptotic analysis, applying to oscillatory integrals taken over n-dimensional space ℝ where i is the imaginary unit. Here f and g are real-valued smooth functions. The role of g is to ensure convergence; that is, g is a test function. The large real parameter k is considered in the limit as $k \to \infty$ .
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