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hep-th2004
Towards an Effective Action for D-Branes
Arjan Keurentjes, Paul Koerber, Stijn Nevens +2
We introduce and review several indirect methods to calculate the effective action for a single D-brane or a set of coinciding D-branes.
hep-th2004
Time-like T-duality algebra
Arjan Keurentjes
When compactifying M- or type II string-theories on tori of indefinite space-time signature, their low energy theories involve sigma models on E_{n(n)}/H_n, where H_n is a not nece…
hep-th2004
E_11: Sign of the times
Arjan Keurentjes
We discuss the signature of space-time in the context of the E_11 -conjecture. In this setting, the space-time signature depends on the choice of basis for the ``gravitational sub-…