LaTeX Lambda (λ) - 完整指南

The Greek letter lambda (λ/Λ) is widely used in mathematics and physics for wavelength, eigenvalues, and lambda functions.

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λ

Lambda

LaTeX Code

No package required

Recommended
\lambda

Lowercase lambda symbol

No package required

Recommended
\Lambda

Uppercase lambda symbol

LaTeX Lambda 是什么？

Lambda is the eleventh letter of the Greek alphabet. It is extensively used in mathematics and physics: lowercase λ represents wavelength in physics and eigenvalues in linear algebra, while uppercase Λ appears in various mathematical contexts. Lambda functions in computer science are also named after this letter.

如何在 LaTeX 中使用 Lambda

方法 1：使用 \lambda

✅无需额外包

Lowercase lambda symbol

示例：使用 \lambda

latex
\documentclass{article}

\begin{document}

% Using the Lambda
Text with \lambda

\end{document}

方法 2：使用 \Lambda

✅无需额外包

Uppercase lambda symbol

示例：使用 \Lambda

latex
\documentclass{article}

\begin{document}

% Using the Lambda
Text with \Lambda

\end{document}

常见用途

Lambda 符号通常用于以下情况：

Wavelength

Represents wavelength of electromagnetic radiation.

Code

Wavelength of visible light: $\lambda = 500$ nm

Output

Wavelength of visible light: λ = 500 nm

Eigenvalue

Used for eigenvalues in linear algebra.

Code

Find eigenvalues $\lambda$ such that $A\mathbf{v} = \lambda\mathbf{v}$

Output

Find eigenvalues λ such that Av = λv

Decay Constant

Used in exponential decay formulas.

Code

$N(t) = N_0 e^{-\lambda t}$

Output

N(t) = N₀ e^(-λt)

完整示例

Wave Equation

Lambda in wave equation

latex
\documentclass{article}
\begin{document}

The relationship between wavelength, frequency, and speed: $c = \lambda \nu$, where $\lambda$ is wavelength and $\nu$ is frequency.

\end{document}

Eigenvalue Problem

Lambda in eigenvalue problem

latex
\documentclass{article}
\begin{document}

The characteristic equation is $\det(A - \lambda I) = 0$, where we solve for $\lambda$.

\end{document}

关于 Lambda (λ) 的常见问题

通过哪种 LaTeX 代码使用 Lambda？

对于 Lambda 符号 (λ)，我们建议使用上面标记为"推荐"的方法。但是，最佳方法取决于您的具体需求：

  • \lambda: Lowercase lambda symbol
  • \Lambda: Uppercase lambda symbol

我在哪里可以使用 Lambda 符号？

Lambda 符号 (λ) 通常用于：

  • 在数学方程式中（数学模式）
  • 在常规文本中（如果支持）
  • 在各种 LaTeX 环境中

我可以在显示模式中使用 Lambda 符号吗？

是的，Lambda 符号 (λ) 在显示模式（$$ $$）下依然有效。这允许您将其独占一行显示，并具有更大的尺寸。

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