Contents

# Contents

## Idea

A bound state of D5-branes and D9-branes, a special case of Dp-D(p+4)-brane bound states.

## Properties

### Relation to small instantons

Under duality between heterotic and type I string theory $D5-D9$ brane bound states translate to small instantons in heterotic string theory given by wrapped NS5-branes, or rather wrapped M5-branes in heterotic M-theory (Witten 96, Gimon-Polchinski 96)

brane intersections/bound states/wrapped branes

S-duality$\,$bound states:

intersecting$\,$M-branes:

## References

Created on February 18, 2020 at 11:07:16. See the history of this page for a list of all contributions to it.