content_image/316363.jpg content_image/316364.jpg content_image/316365.jpg content_image/316366.jpg content_image/316367.jpg
r$_{±}$ characterize the mass and charge of the p brane by 

where d$_{p}$ is a numerical factor given by 

<img src='content_image/316363.jpg'>

<img src='content_image/316364.jpg'>

<img src='content_image/316365.jpg'>

The interpretation for p branes is exactly the same as for charged black holes: r$_{−}$ > r$_{+}$ gives a naked singularity at r = r$_{−}$ ; r$_{+}$ > r$_{−}$ a horizon and removable coordinate singularity at r = r$_{+}$ . 

For an extremal p brane r$_{+}$ = r$_{−}$ and Eq. (2.30) becomes 

Changing coordinates to a distance beyond the horizon 

<img src='content_image/316366.jpg'>

<img src='content_image/316367.jpg'>

