I'm using the cleverref package. This is how I use it (and it works perfectly):

```
\begin{proposition}[Lalala]\label{lol}
Hahahah
\end{proposition}
It follows directly from \Cref{lol}
```

I'm using the following codes in the preamble:

```
\newtheorem{theorem}{Theorem}[chapter]
\newtheorem{prop}[theorem]{Proposition}
\newtheorem{proposition}[theorem]{Proposition}
```

The enviroment \begin{prop} \end{prop} works perfectly too. But if I use \Cref{} with a proposition created with \begin{prop} it does not work. The document shows the symbol ???

Can I fix this problem? I would like to define this enviroments with the corresponding shortcuts like thm,prop,defi…

## Best Answer

Since you have two environments (

`proposition`

and`prop`

) that have the same name ("Proposition") and share a common counter, I will assume that they should also be cross-referenced (with`cleveref`

's macros) using the same prefix label, say, "Proposition". This may be accomplished via an instruction such asA full MWE (minimum working example):

This example produces

(Observe that the arguments of

`\Cref`

need not be entered by ascending numerical value;`cleveref`

takes care of the sorting by default.)