# PanDocElectron/Wiki2Reveal Demo

## First Section

This is a Wikiversity article that can be converted on the fly into a presentation.

## Second Section

This is a Wiki2Reveal Demo page for testing embedded audio and video files. In the exported presentation in Reveal you can see a triangle "►". The triangle indicates that currently an audio comment is available for audioplayer below. Click on the triangle to start the audio in the slide mode of Wiki2Reveal.

## Third Section

• (Presenter Slides) You can present the slides in you browser as presenter in slides mode by pressing (S)
• (Fullscreen Mode) By pressing (F) in you browser (e.g. Firefox) you see slides in full screen
• (Annotation of Slides) you can annotate slides with a stylus. Press (C) to comment slides. Be aware of the fact, that the annotations are performed in your browser ONLY and all annotations are lost on RELOAD of the page.

## Purpose of the Document

This is a Audio slides Wiki2Reveal Test Page that is used to check converting a Wiki page "on the fly" into a reveal presentation.

slide is splitted by audio sample, first Accordion sound

Audio Comments in the text can be used

• to play audio samples in the reveal presentation

Now a Rock Beat for drums

## Splitting Slide with Audio

This slide is split by audio sample, first Accordion sound Press play on audio player and hear the accordion sound Again the Rock Beat for drums

## Blackboard for each Page

• You have a blackboard for each page - press (B) to enter the blackboard mode for the slide
• blackboard slide have a grey background and you can write on it for additional comments
• leave blackboard mode - press (B) again

### Inline Math Expression in Slides

The condition that U be simply connected means that U has no "holes" or, in homotopy terms, that the fundamental group of U is trivial; for instance, every open disk ${\displaystyle U=\{z:|z-z_{0}|  qualifies. The condition is crucial; consider

### Block Math Expression in Slides

${\displaystyle \gamma (t)=e^{it}\quad t\in \left[0,2\pi \right]}$

which traces out the unit circle, and then the path integral

${\displaystyle \oint _{\gamma }{\frac {1}{z}}\,dz=\int _{0}^{2\pi }{ie^{it} \over e^{it}}\,dt=\int _{0}^{2\pi }i\,dt=2\pi i}$

is non-zero; the Cauchy integral theorem does not apply here since ${\displaystyle f(z)=1/z}$  because the domain of ${\displaystyle f}$  is not a convex set (${\displaystyle z=0)}$ .

## Embedded Video

Video about a gravitational lens Two black holes that rotate.