Abstract

We present a universal democratic Lagrangian for the bosonic sector of ten-dimensional type II supergravities, treating ``electric'' and ``magnetic'' potentials of all Ramond-Ramond (RR) fields on equal footing. For type IIB, this includes the five-form whose self-duality equation is derived from the Lagrangian. We also present an alternative form of the action for type IIB, with manifest $SL(2,\mathbb{R})$ symmetry.

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