Generalised BPS conditions [PDF]
Peter WestWe write down two E11 invariant conditions which at low levels reproduce the known half BPS conditions for type II theories. These new conditions contain, in addition to the familiar central charges, an infinite number of further charges which are required in an underlying theory of strings and branes. We comment on the application of this work to higher derivative string corrections.View original: http://arxiv.org/abs/1208.3397
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