Abstract

The consequences of level-rank duality for untwisted D-branes on an SU( N) group manifold are explored. Relations are found between the charges of D-branes (which are classified by twisted K-theory) belonging to su ˆ ( N ) K and su ˆ ( K ) N WZW theories, in the case of odd N + K . An isomorphism between the charge algebras is also demonstrated in this case.

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