From 5cacf4ffaf3a9621ab536195f6469f98a420f054 Mon Sep 17 00:00:00 2001 From: Prefetch Date: Sat, 5 Sep 2026 21:55:33 +0200 Subject: Improve knowledge base --- source/know/concept/sokhotski-plemelj-theorem/index.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'source/know/concept/sokhotski-plemelj-theorem/index.md') diff --git a/source/know/concept/sokhotski-plemelj-theorem/index.md b/source/know/concept/sokhotski-plemelj-theorem/index.md index 445b029..e139954 100644 --- a/source/know/concept/sokhotski-plemelj-theorem/index.md +++ b/source/know/concept/sokhotski-plemelj-theorem/index.md @@ -10,7 +10,7 @@ layout: "concept" --- The goal is to evaluate integrals of the following form, -where $$f(x)$$ is assumed to be continuous in the integration interval $$[a, b]$$: +where $$f(x)$$ is real and continuous in the integration interval $$[a, b]$$: $$\begin{aligned} \lim_{\eta \to 0^+} \int_a^b \frac{f(x)}{x + i \eta} \dd{x} @@ -56,7 +56,7 @@ $$\begin{aligned} &= \lim_{m \to +\infty} \frac{\pi}{\pi} \int_a^b \frac{m}{1 + m^2 x^2} f(x) \dd{x} \end{aligned}$$ -The expression $$m / \pi (1 + m^2 x^2)$$ is a so-called *nascent delta function*, +The expression $$m / (\pi (1 + m^2 x^2))$$ is a so-called *nascent delta function*, meaning that in the limit $$m \to +\infty$$ it converges to the [Dirac delta function](/know/concept/dirac-delta-function/) $$\delta(x)$$: -- cgit v1.3