I have several questions regarding the use of definitions and theorems in the beamer package. Here is an example:

```
\documentclass[mathserif]{beamer}
\usepackage{graphicx}
\usepackage{tcolorbox}
\usepackage{amsthm}
\setbeamertemplate{theorems}[numbered]
\newtheorem{idea}{Proof idea}
\begin{document}
\section[test]{this is a test}
\frame{
\begin{tcolorbox}
\begin{definition} This is a definition. \end{definition}
\begin{theorem} This is a theorem. \end{theorem}
\begin{idea} This is a proof idea. \end{idea}
\begin{proof} This is a proof. \end{proof}
\end{tcolorbox}
}
\end{document}
```

I have several modifications I would like to add, but I don't really know how to do them myself in Latex.

- I would like to have the definitions and theorems numbered separately.
- I have added the new theorem called
`idea`

, this is also numbered. But I would like this**not**to be numbered. - The content of the new theorem
`idea`

is in italic. How can I remove this? - Finally, adding
`section`

or`subsection`

in between frames does not print the section title onto the frame. Has this something to do with the default template I am using? - If it is possible to add sections, I would like the definitions and theorems to be numbered separately, based on the section they are in.

Thank you

## Best Answer

If you disable the automatic creation of Theorem blocks by

`beamer`

and do like the usual way using`amsthm`

you can format all easily.So, the option

`notheorems`

disable the automatic process and then you have to define the environments by yourself. Thus you can specify the style and the numbering.If you don't want to do by hand as above, then:For 1: no solution yet.

For 2 and 3 use

For 5 according to the user guide (pg 119), use the option

`envcountsect`

within the document classNote:4 is not related with numbering. Just use inside the`frame`

to insert a title for it.