> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/da/latex-fejl/29-there-were-multiply-defined-labels.md).

# Der var flere definerede labels

Denne fejl er relateret til krydsreferencer. Den opstår, når du bruger den samme label flere gange til forskellige objekter, hvilket får LaTeX til at blive forvirret, når **`\ref{...}`** anvendes.

## Almindelige årsager

**Den samme label bruges flere gange:**

Det mest grundlæggende eksempel på en sådan fejl er simpelthen at give den samme label til forskellige objekter som vist nedenfor

```latex
\section{Afsnit 1}
\label{algebra}

\includegraphics{image.jpg}
\label{algebra}
```

Her er både billedet (image.jpg) og afsnittet (Afsnit 1) blevet mærket som *algebra*, hvilket får LaTeX til at blive forvirret over, hvilken af dem der skal refereres til, når **`\ref{algebra}` anvendes.** Dette vil føre til en fejl som vist nedenfor

main.tex

Der var labels, der var defineret flere gange.

For at løse dette skal du give en af labels et andet navn.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://overleaf-pro.ayaka.space/latex/da/latex-fejl/29-there-were-multiply-defined-labels.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.