Some Z2-invariant Variables: Constructed of the Scalars Dilaton and Axion
Abstract
Using the dilaton scalar and axion pseudoscalar fields we construct a number of scalars and differential forms which are symmetric under the Z2-subgroup of the group SL(2, R). These invariants enable us to establish various 10-dimensional invariant actions. Other invariants which are not independent from the previous ones will be detached.
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